Six Sigma Green Belt Certification Exam Questions with Correct Answers
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Module
Six Sigma Green Belt
Institution
Six Sigma Green Belt
What should be done with assignable-cause variation?
A) Leave the process alone
B) Try to understand the source
C) Eliminate the source
D) Both B and C - Answer-D) Both B and C
The range chart of the x-barR chart monitors ...
i. Dispersion
ii. Central tendency of the data
iii. Adequate ...
what should be done with assignable cause variatio
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Six Sigma Green Belt Certification Exam
Questions with Correct Answers
What should be done with assignable-cause variation?
A) Leave the process alone
B) Try to understand the source
C) Eliminate the source
D) Both B and C - Answer-D) Both B and C
The range chart of the x-barR chart monitors ...
i. Dispersion
ii. Central tendency of the data
iii. Adequate discrimination
iv. Subgroup average
v. Range of the subgroups
A) I only
B) I and III only
C) I, III, and V only
D) I, III, IV and C only - Answer-C) I, III and V only
You are managing your first Six Sigma team and realize the team will need to make
many of the decisions throughout the DMAIC project. Which description describes the
best approach to decision making?
A) Majority Rule
B) All members must agree to support the decisions derived through consensus
C) A Master Black Belt or Black Belt is the most technically competent member in a Six
Sigma project. It is really best for he or she to make the decisions for the group.
D) Team Compromise - Answer-B) All members must agree to support the decisions
derived through consensus
The following is a data set. What is the range?
12.3 13.5 15.2 11.6 18.2 16.5 14.6 12.4 11.5 17.6
A) 6.7
B) 7.7
C) 6.6
D) 6.8 - Answer-A) 6.7
One sigma (or standard deviation) to the RIGHT of center (the mean) in a normally
distributed process represents what percentage of the curve?
,A) 68%
B) 34%
C) 95%
D) None of the choices are correct - Answer-B) 34%
What should be done with expected variation?
A) Process settings should be continuously adjusted toward the nominal
B) The variation should be reduces
C) Continue monitoring the process for assignable-cause variation
D) Both B and C - Answer-D) Both B and C
The stem-and-leaf plot is a cross between what two tools?
A) Histogram and Control Chart
B) Frequency distribution and histogram
C) Histogram and run chart
D) Run chart and control chart - Answer-B) Frequency distribution and histogram
A normally distributed process exhibited the following...
Mean: 59
Standard Deviation: 3
USL: 70
LSL: 40
Which of the following is correct?
A) PPK = 1.45
B) PPK = 1.56
C) PPK = 2.11
D) PPK = 1.22 - Answer-D) PPK = 1.22
What are the characteristics of good project chart objectives?
i. measurable
ii. Time Bound
iii. Specific
iv. in order from largest to smallest
v. achievable
vi. realistic
A) i, iii, iv and vi only
B) ii and iv only
C) i, ii, iii, v and vi only
D) All of the above - Answer-C) i, ii, iii, v and vi only
Which of the following would BEST describe the statement, that as the training hours
increase (X), the number of employee errors (Y) falls?
, A) A sawtooth relationship
B) Positive correlation on a scatter diagram
C) Negative correlation on a scatter diagram
D) A proven cause-effect relationship - Answer-C) Negative correlation on a scatter
diagram
What is an advantage of using a stem and leaf plot over a histogram?
A) It uses averages instead of individual measurements, and averages vary less than
individuals
B) The raw data is preserved and presented
C) It makes the underlying sources of variation visible
D) It accounts for a shift in the mean - Answer-B) The raw data is preserved and
presented
All of the following statements regarding FMEAs are true except
A) The FMEA is widely recognized as a valuable reliability tool
B) The FMEA focuses more on what can go wrong rather than the effect of the failure
C) The FMEA can evaluate both product and process reliability
D) The FMEA can be conducted at different times in the product lifestyle - Answer-B)
The FMEA focuses more on what can go wrong rather than the effect of the failure
In which of the following cases would I definitely have a negative CPK index?
A) if the mean is 32.4, and the lower spec is 32.8
B) if the mean is 32.4, and the upper spec is 33.4
C) if the mean is 45.6 and the lower spec is 25.6
D) if the mean is 45.6 and the upper spec is 85.3 - Answer-A) if the mean is 32.4, and
the lower spec is 32.8
In this set of numbers (35, 46, 34, 29, 33) which measure of central tendency is best to
use?
A) Mean
B) Arithmetic Mean
C) Average
D) All of the above - Answer-D) All of the above
A critical activity occurs after every phase in DMAIC. This activity is designed, among
other things, to review the team's progress and obtain a go or no-go decision on the
project. Which of the following best describes this activity?
A) Plan-Do-Check-Act (or PDCA)
B) Tollgate review
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