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IASSC Green Belt Study Guide Sigma Latest Update - Actual Exam 225 Questions and 100% Verified Correct Answers Guaranteed A+ Verified by Professor
1-sample Sign test - CORRECT ANSWER: median (Dependent sample t or Z test)
1-sample Wilcoxon - CORRECT ANSWER: median (Dependent sample t or Z test)
A "pull" production system is a production systems where you make as much product as you can regardless of whether the customer needs it or not. True or False? - CORRECT
ANSWER: False
A calculation for reproducibility results in a value of 0 (zero), while repeatability yields a positive number. Without any other considerations, what conclusion can be made regarding the reproducibility result? - CORRECT ANSWER: A reproducibility of zero means there is no operator effect on this measurement.
A combined calculation of repeatability and reproducibility using the average and range method produces a ratio of 7.42% of process tolerance. What can be stated about the
7.42% value? - CORRECT ANSWER: The measurement system is acceptable.
Combined R&R Values:
<10% acceptable 10%-30% marginal >30% not acceptable
A company making rubber tires is evaluated on 5 opportunities per product; in 1000 products manufactured in a month if 100 defects are observed, the RTY is: - CORRECT
ANSWER: 98%
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DPU = D/UxO Y = e^-DPU
100/5,000 = 0.02
2.718^-0.02 = .98
A perfect regression model with all points fitting the regression line has Sum of Square
Errors _____. - CORRECT ANSWER: Equal to 0
It is the difference between the observed value and the predicted value. Usually, the lower sum of squares error better models the regression.
A process A, B, and C are working in series with their first pass yields as A = 94%, B = 98%, C = 99%, then the total DPU is: - CORRECT ANSWER: 9 per 100
A x B x C = 91.19%. TDPU = -In(RTY) = 0.09 = 9 per 100
A process has a high variability and an off-centered mean. What is the first action the
team needs to take? - CORRECT ANSWER: Center the mean
A QFD template allows the Six Sigma team to learn: - CORRECT ANSWER: 1) The most important customer requirements, 2) the performance of a company versus competitors, and 3) the core area of focus for efforts.
A sample ______ is used to make inferences about the population ______. - CORRECT
ANSWER: Statistic; Parameter
A sample is to a statistic as a population value is to a: - CORRECT ANSWER: Parameter
A scoop samples 100/trial. What must be the average number of defects to be an 80%
chance that more than one defect will be found in the sample? - CORRECT ANSWER:
- (This requires using the Poisson table in reverse.) 2 / 3
A Six Sigma project had a lot of improvement measures suggested on training people, setting standardized job instructions, getting surveys done from employees, and so on.Who would be the focused audience for whom this project was aimed at? - CORRECT
ANSWER: Internal customers
A Six Sigma team has been created to improve the process in which a company takes orders for its products. Which of the following tools should the team use to determine all the potential pitfalls and the actual defects that occur? - CORRECT ANSWER: Process FMEA
A team of Six Sigma has reached the control stage of DMAIC. The team has successfully reduced the defect of fabric critical stains from 73 to 1 per fabric roll. Now
what type of control chart should the team recommend? - CORRECT ANSWER: A
control chart based on the Poisson distribution such as the u-chart.
Continuous data:
I-MR Chart (individual data points, destructive testing) Xbar and R Chart (subgroups) Xbar and s Chart (subgroups with SD)
Discrete data (constant or varying subgroup size):
np Chart (Defectives, # of units rejected) p Chart (Defectives, % of units rejected) c Chart (Defects, # of defects) u Chart (Defects, average # of defects)
According to a national grocery store chain manager, only 6% of customers who have surveys mailed to their homes return them filled out completely. What is this type of
sampling error called? - CORRECT ANSWER: Non-response error
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