Six Sigma Black Belt
TestPrep Academy
Exam: SSBB
Question: 1 / 55
90:00
A roofing company has to build trusses with a 33.00 degree angle at the peak. An angle with a known accuracy of 33.000 degrees has been created as the standard. To test the accuracy of the measuring device, the standard angle is measured 12 times. The resolution of the device is 0.075 degrees. And the tolerance set for the process is +/- 0.010, giving a tolerance range of 0.02.
Which statement offers the correct values and interpretation of bias in this scenario? Round the value of bias to three decimal places.
A. The bias value of 0.019 indicates that the device is overestimating the true value and bias expressed as a percentage of tolerance is 95%
B. The bias value of -0.019 indicates that the device is underestimating the true value and bias expressed as a percentage of tolerance is 95%
C. The bias value of 6.57 indicates that the device is overestimating measurements, and this bias greatly exceeds the tolerance
D. The bias value of -0.019 indicates that the device, on average, is returning measurements that are larger than the reference value and bias expressed as a percentage of tolerance is 95%
The Six Sigma team at a custom cabinetry manufacturer has just undertaken a new project. The team has identified an opportunity for improvement in its custom staircase design process. The team has developed a new process, but wants to use a pilot test before full-scale implementation.
Currently, the finishers spend a lot of time reaching, bending, and replenishing materials. A new process has been designed to reduce waste, making the whole process more efficient. The work space of the finishers has been redesigned to ensure tools and materials are within reach. A toolbox was added in the arm of the finishers' chairs. A kanban system has been implemented to alert floor supervisors when materials are low so that they can be restocked before the finishers need them. Workers with varying degrees of expertise and experience have been selected to participate in the pilot.
Members of the Six Sigma team are on site to watch, listen, and record details of what happens during the pilot testing. Carlos, one of the participants, can't find his screw drivers. Tracy, a Six Sigma team member, tells him to look in the tool holder, located in the armrest of his chair. Tracy records the incident and sticks around in case Carlos has any other trouble. Seeing that another participant needs help, Tracy moves on to find out what the problem is. This time, the participant just wants to tell Tracy what a good job she thinks the team has done designing the new process. However, she also has a recommendation about the toolbox located in the arm of the chair. Tracy takes detailed notes of participants' feedback, but she refrains from adding commentary of her own on the design of the new process.
What should Tracy have done to improve the way in which the pilot test was conducted?
A. Tracy should have shared her thoughts on the new process and the toolbox
B. Tracy should have allowed Carlos to find the tool on his own, and taken notes of what he did and said
C. Tracy should have taken notes
As the Design for Six Sigma methodology evolves, there are many variations in how DFSS is achieved and a variety of tools in use. Identify which tools and approaches are part of the DFSS methodology.
A. DOE
B. Relay approach
C. Cross-functional teams
D. Stakeholder analysis
E. Tollgating
F. FMEA
What are the main goals of strategic planning in Lean Six Sigma?
A. To use SWOT and PEST analyses to understand where the organization is and how that affects Lean Six Sigma goals
B. To identify and decide what the organization wants to achieve from the Lean Six Sigma deployment
C. To encourage equal focus on all projects and initiatives
D. To ensure senior staff are exclusively involved in setting organizational goals
A virtual team is facing challenges due to constricted download bandwidth over satellite transmissions. And even when data reaches recipients in a timely fashion, the acronyms some members use are confusing. There's excessive competition between certain members as well.
What are appropriate suggestions for dealing with these symptoms of team challenges?
A. Ensure all members explain their comments, viewpoints, and acronyms fully
B. Use videoconferencing exclusively
C. Mix up the task subcommittees to ensure each person works with every other team member eventually
D. Limit the downloading bandwidth needed by creating online-only project sites that all members can access
E. Write up a team contract with leadership roles, task assignments, ground rules, and decision-making processes
A large hotel chain is kicking off a continuous process initiative that has two objectives: eliminate waste and increase speed in the guest services division, and eliminate variation in the IT division. The executive board is aiming at world-class hotel status and is prepared to make an extensive time and financial commitment to the initiative.
Which statement proposes the best approach for this organization?
A. Implement Six Sigma to begin long-term improvements; when the first projects near completion, implement Lean to harvest low-hanging fruit
B. Implement Six Sigma to make long-term, lasting process improvements
C. Implement Lean to reduce variation; then implement Six Sigma and run kaizen events to harvest low-hanging fruit
D. Implement Lean to eliminate waste and increase speed; then implement Six Sigma to work on eliminating variation
Like all designs, the Latin square design has specific characteristics. What are they?
A. The design is less efficient relative to other designs
B. The design requires that the number of rows, columns, and treatments be the same
C. The design tends to return larger experimental error as the size of the square increases
D. The design lacks a way to control the variation of two noise factors
E. The design provides few degrees of freedom for error in small squares
F. The design can't measure interaction effects
Two automated manufacturing processes run every four hours around the clock in two plants in different time zones. A Six Sigma team performs a two-way ANOVA to find out whether variation for both processes in both locations is the same or different.
Assuming an alpha risk value of 0.1, select the statements that accurately interpret the test results.
A. The interaction effect of process and location is not statistically significant
B. The effect of the process factor on response is statistically significant
C. The team can conclude with 90% confidence that there is a significant interaction effect between the process and location factors
Which statements correctly describe benchmarking?
A. Benchmarking is a structured process of adopting or adapting the best features of successful processes
B. Benchmarking is an easy way to gain competitive advantage
C. Benchmarking is strictly a form of competitive analysis
D. Benchmarking applies objective measurement and a scientific method of analysis to enhance value
E. Benchmarking enables teams to set realistic targets and find ways to achieve them
You're examining the PCE of the manufacturing process for an electronics firm. The sum of work that a customer would recognize as necessary to create the top-of-the-line model DVD player is 6 minutes and the process takes a total of 18 minutes on average. In this case, what is the PCE?
Express your answer as a percentage, rounded to the nearest whole number.
A. 33%
B. 33
C. 33 percent
Select the four characteristics of CTx requirements.
A. CTx requirements are equal in importance to other requirements
B. CTx requirements are identifiable at different levels of operation
C. A change in CTx requirements can impact the system
D. In a CTx requirement, CT represents "closest to"
E. CTx requirements are measurable
F. CTx requirements relate to business or customer requirements
The Six Sigma team at an electronics manufacturer has initiated a project to improve the assembly line process. Hazel, the Black Belt on the project, has identified an opportunity for improvement in how the company prepares orders for shipping.
Hazel's company sells radio transmitters to customers who build their own radios. Presently, the parts are picked and packed and then sent for inspection. The parts have to be unpacked in order to be inspected and then packed again. The Six Sigma team has identified this process as being wasteful and has developed a new process that it believes will reduce waste.
A pilot test has been designed to test the new process before it's implemented throughout the organization. A group of assembly line workers has been trained in the new process and will be testing it. The new process will combine the picking, packing, and inspecting of the parts required to build the radio transmitter into one step.
Hazel addresses the participants, advising them to go about their work as if the Six Sigma team wasn't there. One of the participants is quite frustrated and comments on how the procedure set out for inspecting the components is not synchronized with how the components need to be packed into the box. Hazel is interested to find out how this experienced worker would approach the task and encourages her to complete the tasks of packing and inspecting as it makes the most sense to her. Hazel watches carefully.
What should Hazel have done to improve the way in which the pilot test was conducted?
A. Hazel should have remained objective
B. Hazel should have explained how the proposed process was better
C. Hazel should have taken notes
D. Hazel should have asked the participant to stick to the process outlined in the test instructions
Which descriptions exemplify the detrimental impact hidden factories can have on an organization?
A. Production is paused at a laboratory while staff undergo additional training on new waste reduction methods
B. Customer satisfaction at a mail order company plummets due to several instances of delivering a wrong product or a model that customers never asked for
C. Regular changes in suppliers according to who offers the best quality products at competitive rates
D. One of two identical, side-by-side production processes has a higher scrap rate than the other, but the cause is unknown
What is this project's ROI for the year, expressed as a percentage? Round your answer to one decimal place.
A. 6.2%
B. 7.1%
C. 7.4%
D. 5.1%
E. 8.3%
Identify statements that describe how the balanced scorecard approach helps align projects with organizational goals.
A. It reduces the need for data analysis
B. It provides detailed performance data
C. It gives insight into how processes affect one another
D. It compares current performance with projected performance
E. It identifies areas where problems occur and offers solutions to them
A federal health agency has designed and run a full factorial experiment to evaluate two advertisements.
Which statements accurately describe the experiment?
A. The response value for the sixteenth run is 3.21
B. The runs are randomized
C. The response variable is increased awareness
D. There is one replicate
E. There are four factors
If event A – the probability of buying a new car – is .6 and event B – the probability of buying a motorcycle – is .3, what is the probability of buying either of the vehicles? The buyer must buy at least one item and the events are mutually exclusive.
A. 0.9
B. .9
C. 90%
D. 90
Anton and his team at a city hospital have had a productive brainstorming session as they wrestle with the problem of why some departments have better access time for patients than others. Anton knows that their list of ideas will need to be grouped into related areas and then the team will have to determine which of those areas are having the most impact on the departments.
Which two tools could Anton use to facilitate this?
A. Activity network diagram
B. Matrix diagram
C. Affinity diagram
D. Tree diagram
You are working with a Six Sigma team for a call center that wants to estimate, with 90% confidence, the range for the average caller wait time during the peak hours of 4:00 p.m. to 8:00 p.m. You select 50 calls randomly and the wait time is recorded. The sample mean is 3.55 minutes and the standard deviation is 1.22 minutes.
What is the confidence interval for this test for means, and how should it be interpreted?
A. Confidence interval is 3.27 - 3.83; the sample mean falls within the confidence interval, so the mean percentage of caller wait time is the same as the sample mean
B. Confidence interval is 3.62 - 3.88; the sample mean falls outside the confidence interval, so the mean percentage of caller wait time is different from the sample mean
C. Confidence interval is 3.27 - 3.83; the sample mean falls outside the confidence interval, so the mean percentage of caller wait time differs from the sample mean
D. Confidence interval is 3.62 - 3.88; the sample mean falls within the confidence interval, so the mean percentage of caller wait time is the same as the sample mean
Which are characteristics of a control plan?
A. Each department's control plan is stored in the same place
B. A control plan may address a product or one or more related processes
C. A control plan includes procedures for detecting the root causes of variation in a process
D. A control plan includes information on frequency and method of measurement, as well as miscellaneous information such as notes and meeting minutes
E. A control plan is an accessible, single document summary
F. Checking, monitoring, and response activities are included in the control plan
An important meeting is underway, and participants are discussing new product ideas. Before the meeting begins, the team waits for Adrienne to arrive. After five minutes, Hugh remembers that Adrienne told him she would be away from the office meeting with clients.
Then, the team leader, Jonathon, calls the meeting to order. He begins by listing the main discussion items on a flip chart. No one has seen the items prior to the meeting, and it takes some time for the team to assimilate the information on the list.
Eventually, they get started. A further delay occurs as Jonathon tries to get the laptop's projector working. Jonathan scheduled 10 minutes for each of the five discussion points on the list, 5 minutes for final voting, and 5 minutes to review action items. Team members stick closely to this timeline, recording decisions and action items as they go, and averaging 10 minutes per item. At one point, the discussion gets heated as an idea from Annette becomes an unexpected focus of debate. Her idea is a departure from the subject that the team had been discussing, and it steers the team away on a tangent that eats into the allocated meeting time.
Jonathon uses the agenda as a way of getting the discussion back on track. He asks the team how the heated discussion relates to the current agenda item and points out that the meeting is nearing the end and they still need to discuss other points.
Team members agree to park the issue until a later date, but because of the initial delays, they arrive at the end of the scheduled hour and still need to make decisions. Jonathon decides to press on and finish the agenda items, to avoid carrying them over to next week's meeting. He quickly summarizes the key decisions and has team members restate their respective action items. The meeting adjourns 15 minutes later than planned.
What should Jonathon have done differently to make his meeting more effective? Identify the strategies that he did
not
apply.
A. Used the agenda to keep the discussion on track
B. Been prepared
C. Reviewed the key points of the meeting
D. Allowed sufficient time for discussion items
E. Observed the start time and end time of meetings
F. Involved the team in developing the agenda
What is the ROI percentage for the year, expressed as a percentage, for this particular project? Round your answer to one decimal place.
A. 204.3%
B. 242.4%
C. 232.4%
D. 42.4%
A retail bank wants to determine the joint probability for two key continuous process variables in auto loan application processing – the experience of the processing agent, and the loan amount. Both variables are continuous, and a correlation study reveals that they are poorly correlated. Which distribution is the best for this data?
A. Bivariate normal
B. Lognormal
C. Exponential
D. Weibull
Harry is a Six Sigma Black Belt conducting a stakeholder analysis to streamline the roll out of new products at his auto parts plant.
Identify the steps he must take to do this successfully.
A. He creates and implements a plan to manage the stakeholders during the improvement project
B. He creates a stakeholder analysis table to identify stakeholders, their role, and influence on the product delivery process
C. He engages in interviews with key stakeholders, including the floor manager, customers, and team members
D. He only engages with leadership after a deployment strategy has been formulated
E. He chooses only stakeholders who are internal to the process
Management at an international banking company is implementing Six Sigma. In order to determine what potential roadblocks may arise, the enterprise leadership team is conducting a roadblock analysis.
Access the International Banking Company Roadblock Analysis for the results of the analysis, then identify statements that accurately classify the potential roadblocks identified.
A. Assigning five part-time Black Belts results in an inefficient organizational structure roadblock
B. Executives demanding quick results is a roadblock indicating inadequate support from management
C. The fact that the Six Sigma effort's projects are scoped along department lines is an inefficient organizational structure roadblock
D. The fact that team leaders avoid calling out specific problems for fear of being fired is an inadequate support from management roadblock
E. Assigning only employees who can be spared to Black Belt positions and making those positions part time represents inadequate resource commitment
What is the purpose of gap analysis in Six Sigma?
A. Gap analysis is used to measure key performance metrics, thereby helping to understand how a current process must be changed in order to achieve improvement
B. Gap analysis is used to identify the difference between an organization's current performance and the potential performance in order to develop strategies to bring actual performance in line with desired performance
C. Gap analysis is used to define opportunities for improvement by showing how current processes are falling short of customer requirements
A quality improvement team wants to improve the strength of the plastic resin produced at its facility.
Which statements accurately describe the experiment?
A. The runs are randomized
B. There are two factors
C. The response is measured at 338.03 for the twelfth run conducted
D. There are four replicates
E. The response variable is material strength
What are the considerations associated with collecting customer data?
A. Internal customers can be just as valuable as external customers
B. There are three organizational levels you can obtain data from
C. Data collection methods focus primarily on internal customers
D. The process level includes customers who have major influence at their companies
E. You can use two main types of data sources to gather information
What are the characteristics of CTx requirements?
A. CTx requirements are measurable
B. CTx requirements are derived directly from the voice of business
C. CTx requirements do not change during project implementation
D. CTx requirements are identifiable at different levels of operation
E. A change in CTx requirements can impact the system
F. CTx requirements relate to business or customer requirements
Which statement best summarizes the benefit of a postmortem in a Six Sigma project?
A. To assist an organization with continuous improvement by serving as a guide for future Black Belts
B. As part of a Black Belt's toolkit, to assist in performing thorough risk analysis to avoid making mistakes
C. To enable organizations to improve by building on – rather than relearning – lessons from completed projects
D. To ensure that Black Belts have an opportunity to relearn important lessons on every new project
Which circumstances should be present in order for a fractional factorial design to be used?
A. Good estimates of main effects and lower-order interaction effects can be obtained without testing all combinations
B. There are too many factors and levels to test manageably with a full factorial design
C. There are fewer than eight factors to estimate main and interaction effects for
D. There are too many factors to allow for the efficient use of time, resources, and effort using a full factorial design
E. There is confounding in the full factorial experiment too
What statements correctly describe goals and features of total productive maintenance (TPM) as implemented in an organization?
A. All employees are involved, from leaders to operators
B. One goal is losses of less than ten minutes from setup and adjustment
C. The goal of TPM is to increase production while decreasing the number of employees needed
D. One goal is for total machine effectiveness
E. One goal is to reduce losses from process defects, equipment failure, and idling and minor stoppages, and to reduce speed to under ten minutes
You are carrying out a study on local residents to find out how well the neighborhood mall is serving their needs. You take a sample of 500 people and find a p-value of 0.05.
What does this test result imply about statistical and practical significance?
A. An α value of 0.09 implies that the results are practically significant and you fail to reject the null hypothesis
B. A small sample size of 500 implies that there's a good chance of finding a small difference and deeming it practically significant
C. A large sample size of 500 implies that small differences may be detected as statistically significant, even if not practically significant
D. An α value of 0.09 implies that the results would be considered statistically significant and you would reject the null hypothesis
E. All results must be considered for practical significance before instituting any changes
Which statement reflects the best strategy for ongoing evaluation?
A. Use a failure mode and effects analysis (FMEA) to identify what could go wrong with the process
B. Balance your measurements with interviews of salespeople to learn their perspectives on evolving customer and market needs
C. Use a combination of audit results and results of SWOT analyses to explore process problems
D. Use a balance of measurements – performance measures and opportunities analysis – to obtain a broad perspective on the performance of the improved processes
The enterprise leadership team at a national hotel chain is assessing potential roadblocks to Six Sigma deployment in the company by performing a roadblock analysis.
Access the Hotel Chain Roadblock Analysis for the results of the analysis, then identify statements that accurately categorize the potential roadblocks identified.
A. The standard procedure requiring top management consensus for team assignments reflects an inefficient organizational structure roadblock
B. One inappropriate culture roadblock is that bonuses are assigned to individuals rather than teams
C. The fact that employees don't like working in teams is an inappropriate organizational culture roadblock
D. The fact that the CEO will only be present at the kick-off reflects inadequate commitment of resources
E. Instructing the project champion to skip the less important steps to meet deadlines is an inappropriate organizational culture roadblock
A Six Sigma Black Belt works for a university. Her current project involves improving services for students who need to learn English as a second language. What are good recommendations for this team's selection?
A. The team should include some faculty members
B. All department heads and their support staff should be part of the team
C. The team can use a personality inventory tool to facilitate teamwork by learning about potential members' aptitudes and decision-making styles
D. The team should have a range of personality types and skills
E. The team should have a total of no more than 20 members
F. When adding a new team member, the team should be involved in the selection process
An important purpose of the design of experiments, or DOE, approach is achieving a target.
What are some of the other purposes of DOE?
A. Improving robustness
B. Identifying 20% of the inputs
C. Identifying key factors affecting an output
D. Choosing between alternatives
E. Running numerous experiments
F. Optimizing results
Which are examples of variables that are well suited for SPC?
A. The Six Sigma team at an auto manufacturer determines that assembly time directly affects the cost of cars
B. The HR Department determines that employees learn just as well when the training program doesn't adhere to standards
C. A team determines that the moisture content impacts the durability of the product significantly
D. The Six Sigma team at a healthcare facility notices that a certain X-ray machine has a high defective rate
E. A software developer creates a series of programs that don't have any significant variation
F. A large number of a soda manufacturer's customers have requested that the beverages have a higher level of carbonation
Which four statements describe how leading and lagging indicators are connected to organizational goals and strategies?
A. A cause and effect chain exists between leading and lagging indicators in tracking business goals
B. Lagging indicators with leading indicators don't indicate how outcomes are achieved
C. Leading indicators with lagging Indicators do not result in a measurable performance
D. Lagging indicators can be used to measure performance outcomes based on data collected over a specified period
E. A balanced combination of leading and lagging indicators should be used for enhanced business performance overall
F. Leading indicators are predictive in nature and forecast possible market trends
Occasionally, you may need to deal with interpersonal difficulties and group challenges that interrupt the positive flow of a meeting.
How can a team leader deal with the maladaptive behaviors of groupthink and risky-shift?
A. Encourage critical thinking and free discussion of alternatives
B. Reward individuality of thinking and of action
C. Ask how members would proceed if they had to use their own money
D. Break the team up and incorporate new team members
E. Challenge the team to devise alternative solutions
F. Give every team member a role or a rank
Identify the characteristics of effective documentation.
A. Is highly detailed
B. Is written at a high level
C. Is accessible
D. Is simple, brief, and clear
E. Includes contingency instructions
F. Is current
A Six Sigma team wants to improve the durability of lenses for a manufacturer of sunglasses. Investigation has indicated that two factors – the thickness of scratch-resistant coating and the type of lens – have the greatest impact on lens durability. The team decides to test each factor at two levels. A randomized experiment with four runs involving all possible combinations of factors and levels has been planned.
Will this meet the team's resolution needs, and why or why not?
A. Yes, the team has planned a fractional factorial experiment, which meets its resolution needs
B. Yes, the team has planned a full factorial experiment, which meets its resolution needs
C. No, the team has not included enough runs for a full factorial experiment
D. No, the team has planned a fractional factorial experiment and it won't meet resolution needs
A team testing how well brand new defibrillator batteries maintain their charge in cold, dry climates was concerned when the measurements obtained seemed to be contrary to preliminary studies. Then it was discovered that the lab used to conduct the test was too humid. The test was done again. This time the lab was sure to test when the environmental conditions in the lab accurately mimicked the climate being simulated. Unfortunately, they failed to replace the batteries.
Which types of error are introduced in this scenario?
A. Man
B. Mother Nature
C. Management
D. Materials
E. Methods
F. Machine
What conditions should exist in order to recommend the use of a randomized block design?
A. Blocks are more homogeneous than unblocked groups of runs
B. All noise factors have been tracked and recorded
C. Blocking will increase variation making it easier to measure
D. Variation introduced by noise factors threatens to obscure results
E. One factor is of primary interest in the experiment
A team in a customer support center is comparing the performance of three different operators, and has conducted a goodness-of-fit test to determine whether the distribution of dropped calls among the operators is consistent with last year's pattern. Review the details in the picture.
Was the test calculated and interpreted correctly?
A. Yes, the test was calculated and interpreted correctly
B. The test was interpreted correctly, but the interpretation was based on an incorrect calculation
C. The calculation was performed correctly but the results were interpreted incorrectly
Management at an electronics company that specializes in portable music devices has just finished its forecasting activities. A group of employees with diverse experience and expertise has been assembled to perform scenario planning. Building on what was learned from forecasting, the team is able to establish a present starting point for the scenarios that will be developed to explain possible future outcomes.
The group is able to predict that demand will continue to grow. Next, the group considers uncertain but plausible external environmental variables, such as the company's technology becoming so regulated that the full scope application of the technology becomes restricted for the company. All the variables, predicted and possible, are grouped according to similarity.
Based on best practice, what activities should the team do to complete the scenario planning task?
A. Narrow the variables to the two most critical – that demand will continue to grow while full scope application becomes a risk
B. Collect statistical data on ownership and demand in order to compare the variables and establish priority
C. Develop scenarios to explain how the future might unfold for various combinations of the variables
D. Create a matrix to analyze the relationship between demand and the full scope application of the technology
E. Conduct a workshop with production managers to determine if they can still use the technology in its full scope
Ben is a Six Sigma Black Belt leading a stakeholder analysis in a project that is designed to improve the order fulfillment process at his services company.
Identify the steps in the scenario.
A. He waits until a deployment strategy has been formulated before engaging with leadership
B. He identifies only stakeholders who are internal to the process
C. He creates and implements a plan to manage the stakeholders in the improvement project
D. He creates a stakeholder analysis table to identify stakeholders, their roles, influence, and action plan for the order fulfillment process
E. He conducts interviews with key stakeholders, including the sales manager, team members, and customers
You're working with a laptop producer to decrease the amount of defects on the manufacturing line.
Which statements correctly interpret the elements of the laptop manufacturing process study?
A. This is a one-tailed test to the left with a strong power of 0.9 and a 95% confidence interval
B. The chance of rejecting the null hypothesis when it's true is 5% and failing to reject the null hypothesis when it's false is 10%
C. This is a one-tailed test to the right with a weak power of 0.90 and a 90% confidence interval
D. The chance of rejecting the null hypothesis when it's true is 10% and failing to reject the null hypothesis when it's false is 5%
In what ways can the balanced scorecard approach be used to help align projects with organizational goals?
A. By eliminating the need for reporting on a project
B. By measuring current performance and comparing it with desired performance
C. By determining how different activities impact each other
D. By enabling you to change organizational goals
E. By offering solutions to close any gaps in a project
You're conducting a study on a new dairy cow diet to increase milk production.
Identify the statements that correctly interpret the elements of the dairy study.
A. This is a two-tailed test with a 95% chance that the population mean will fall within the confidence interval and a strong power of 0.99
B. There's a 5% risk of rejecting the null hypothesis when it's true and a 1% risk of failing to reject the null hypothesis when it's false
C. This is a one-tailed test to the right with a 90% chance that the population mean will fall within the confidence interval and a weak power of 0.9
D. There's a 5% risk of rejecting the null hypothesis when it's true and a 10% risk of rejecting the null hypothesis when it's false
An electronics manufacturer produces several electronic components that are all quite similar but are produced on different production lines. Each production line has an assigned operator. These operators take measurements, using a common device, each morning as they start their shift and each afternoon as their shifts are ending. Typically, this data is used to identify process variation. But the company also uses it to check measurement correlation. Last month's data indicates a percent agreement of 88% for measurements taken in the morning shift.
What does this data say about correlation in the measurement system?
A. A percent agreement value of 88% indicates a high correlation, meaning that operators are using consistent measurement methods at the beginning and end of all shifts
B. A percent agreement value of 88% indicates that the measurement correlation is high, and components are consistently the correct size
C. A percent agreement value of 88% indicates that the measurement of all the data gatherers are highly correlated, when measuring similar artifacts using the same devices
D. A percent agreement value of 88% indicates a moderate correlation between the measurements of all operators, when measuring similar artifacts using the same device
Improving robustness and optimizing results are two purposes of the design of experiments, or DOE, approach.
Identify some of the other purposes of DOE.
A. Increasing variability
B. Conducting numerous runs
C. Achieving a target
D. Choosing between alternatives
E. Identifying key factors affecting an output
Hoshin Kanri is a powerful business strategy approach. Which statements best describe how Hoshin Kanri is applied in Six Sigma strategic planning?
A. Six Sigma and Hoshin Kanri focus on continuous improvement
B. Six Sigma creates readiness for Hoshin Kanri planning
C. Hoshin Kanri and Six Sigma are both measurement-driven
D. Hoshin Kanri informs a Six Sigma X-Matrix
Identify the implications of the central limit theorem for inferential statistics.
A. The data calculated from samples can be used in control charts, which assume normality
B. A sample size of two will provide a near normal sampling distribution for most population distributions
C. Sample sizes of five are usually sufficient to make x bar approximately normal no matter how far the population is from being normal
D. Confidence intervals can provide probabilistic ranges of values for true population characteristics
E. The standard deviation of the population can be derived from the standard deviation of the x bar distribution
The Six Sigma team at a soil packaging plant wants to determine the linearity of an automatic weighing machine. Team members want to know if the weighing machine is accurate over its operating range. Based on its work, the team knows the linear equation is y = -0.02300 + 0x and the process variation is 0.05.
Which statements are true based on the information conveyed by the linearity plot?
A. Linearity is optimal
B. There is bias in the measurements
C. The linearity may indicate error in the value of x at the maximum or minimum range
D. Linearity is 0.00115
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