SIX SIGMA GREEN BELT CERTIFICATION EXAM
NEWEST 2025 QUESTIONS AND DETAILED CORRECT
ANSWERS | A+ GRADE
The statistics that summarize a population are referred to as
a. categorical statistics
b. descriptive statistics
c. probabilistic statistics
d. control statistics - ans -b. descriptive statistics
Which of the following measures is increased when process performance is
improved?
a. Variability range
b. Capability index
c. Repeatability index
d. Specification limits - ans -b. Capability index
Which of the following tools can be used to identify and quantify the source of a
problem?
a. Affinity diagram
b. Control chart
c. Pareto chart
d. Quality function deployment - ans -c. Pareto chart
A correlation analysis is used to provide a numeric value for which of the
following types of relationships between two variables?
a. Random
b. Linear
c. Curvilinear
d. Causation - ans -b. Linear
Which of the following tools is used to translate broad requirements into specific
requirements?
,a. A quality control plan
b. The theory of constraints (TOC)
c. A critical to quality (CTQ) tree
d. A process flowchart - ans -c. A critical to quality (CTQ) tree
Which of the following tools is used extensively in quality function deployment
(QFD)?
a. Affinity diagram
b. Matrix diagram
c. Cause and effect diagram
d. Activity network diagram - ans -b. Matrix diagram
Which of the following control charts is used to monitor discrete data?
a. p
b. I&mR
c. Xbar
d. Xbar and R - ans -a. p
Which of the following shapes is used to present a termination point in a
flowchart?
a. Rectangle
b. Diamond
c. Arrow
d. Oval - ans -d. Oval
For a normal distribution, two standard deviations on each side of the mean
would include what percentage of the total population?
a. 95%
b. 68%
c. 47%
d. 34% - ans -a. 95%
,Which of the following is a commonly accepted level for alpha risk?
a. 0.05
b. 0.50
c. 0.70
d. 0.95 - ans -a. 0.05
When the sampling method used creates a difference between the result
obtained from the sample and the actual population value, the difference is
known as
a. Correlation
b. Precision
c. Accuracy
d. Bias - ans -d. Bias
Which of the following is an example of mistake-proofing?
a. Using an Xbar and R chart to prevent errors
b. Using 100% inspection to detect and contain defects
c. Using color coding as an error signal
d. Having the team that created the errors repair them - ans -c. Using color coding
as an error signal
Which of the following is the key objective of a six sigma project?
a. Developing detailed control charts for critical processes
b. Developing a matrix to understand the how's and what's of a problem process
c. Reducing variation in critical processes
d. Reducing investment costs while improving output quality - ans -c. Reducing
variation in critical processes
Which of the following tools is used to identify potential events and contingencies
for an implementation plan?
a. PERT chart
b. Process decision program chart
, c. Fishbone diagram
d. House of quality - ans -b. Process decision program chart
Which of the following measures is used to show the ratio of defects to units?
a. DPU
b. DPO
c. DPMO
d. PPM - ans -a. DPU
Which of the following terms is used to describe the risk of a type I error in a
hypothesis test?
a. Power
b. Confidence level
c. Level of significance
d. Beta risk - ans -c. Level of significance
Positional, cyclical, and temporal variations are most commonly analyzed in
a. SPC charts
b. Multi-vari charts
c. Cause and effects diagrams
d. Run charts - ans -b. Multi-vari charts
In order for value flow analysis to be effective, a team must take which of the
following steps first?
a. Define the value stream
b. Eliminate backlogs in the value stream
c. Identify overlapping functions in the value stream
d. Identify specific work practices within the value stream - ans -a. Define the
value stream
When an inspection process rejects conforming product, what type of error is
being made?
NEWEST 2025 QUESTIONS AND DETAILED CORRECT
ANSWERS | A+ GRADE
The statistics that summarize a population are referred to as
a. categorical statistics
b. descriptive statistics
c. probabilistic statistics
d. control statistics - ans -b. descriptive statistics
Which of the following measures is increased when process performance is
improved?
a. Variability range
b. Capability index
c. Repeatability index
d. Specification limits - ans -b. Capability index
Which of the following tools can be used to identify and quantify the source of a
problem?
a. Affinity diagram
b. Control chart
c. Pareto chart
d. Quality function deployment - ans -c. Pareto chart
A correlation analysis is used to provide a numeric value for which of the
following types of relationships between two variables?
a. Random
b. Linear
c. Curvilinear
d. Causation - ans -b. Linear
Which of the following tools is used to translate broad requirements into specific
requirements?
,a. A quality control plan
b. The theory of constraints (TOC)
c. A critical to quality (CTQ) tree
d. A process flowchart - ans -c. A critical to quality (CTQ) tree
Which of the following tools is used extensively in quality function deployment
(QFD)?
a. Affinity diagram
b. Matrix diagram
c. Cause and effect diagram
d. Activity network diagram - ans -b. Matrix diagram
Which of the following control charts is used to monitor discrete data?
a. p
b. I&mR
c. Xbar
d. Xbar and R - ans -a. p
Which of the following shapes is used to present a termination point in a
flowchart?
a. Rectangle
b. Diamond
c. Arrow
d. Oval - ans -d. Oval
For a normal distribution, two standard deviations on each side of the mean
would include what percentage of the total population?
a. 95%
b. 68%
c. 47%
d. 34% - ans -a. 95%
,Which of the following is a commonly accepted level for alpha risk?
a. 0.05
b. 0.50
c. 0.70
d. 0.95 - ans -a. 0.05
When the sampling method used creates a difference between the result
obtained from the sample and the actual population value, the difference is
known as
a. Correlation
b. Precision
c. Accuracy
d. Bias - ans -d. Bias
Which of the following is an example of mistake-proofing?
a. Using an Xbar and R chart to prevent errors
b. Using 100% inspection to detect and contain defects
c. Using color coding as an error signal
d. Having the team that created the errors repair them - ans -c. Using color coding
as an error signal
Which of the following is the key objective of a six sigma project?
a. Developing detailed control charts for critical processes
b. Developing a matrix to understand the how's and what's of a problem process
c. Reducing variation in critical processes
d. Reducing investment costs while improving output quality - ans -c. Reducing
variation in critical processes
Which of the following tools is used to identify potential events and contingencies
for an implementation plan?
a. PERT chart
b. Process decision program chart
, c. Fishbone diagram
d. House of quality - ans -b. Process decision program chart
Which of the following measures is used to show the ratio of defects to units?
a. DPU
b. DPO
c. DPMO
d. PPM - ans -a. DPU
Which of the following terms is used to describe the risk of a type I error in a
hypothesis test?
a. Power
b. Confidence level
c. Level of significance
d. Beta risk - ans -c. Level of significance
Positional, cyclical, and temporal variations are most commonly analyzed in
a. SPC charts
b. Multi-vari charts
c. Cause and effects diagrams
d. Run charts - ans -b. Multi-vari charts
In order for value flow analysis to be effective, a team must take which of the
following steps first?
a. Define the value stream
b. Eliminate backlogs in the value stream
c. Identify overlapping functions in the value stream
d. Identify specific work practices within the value stream - ans -a. Define the
value stream
When an inspection process rejects conforming product, what type of error is
being made?
