SIX SIGMA GREEN BELT : AIGPE
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Describe Sigma Shift - ANSWERS-The long-term deterioration of
process performance
What does DUDO stand for? - ANSWERS-Defects
Units
Defectives
Opportunity for Errors
How is Defects per Opportunity (DPO) calculated? - ANSWERS-
Number of Defects over Opportunity for Error * Number of Units
What does a fishbone diagram help to identify? - ANSWERS-The
trivial many root causes. Identify possible causes for an effect or
problem.
What are the major categories of a fishbone diagram? (5M's) -
ANSWERS-Machines
Manpower
Methods
Material
,Mother Nature
What is a box plot? - ANSWERS-a graphical summary of data that is
based on a five-number summary.
Highest Value
Third Quartile
Median
First Quartile
Lowest Value
What is a scatterplot? - ANSWERS-A graphed cluster of dots, each of
which represents the values of two variables. Displays relationships or
associations between the two variables.
What is a control impact matrix? - ANSWERS-A prioritization tool
that is used in conjunction with brainstorming. Rows: In-Control,
Out-of-Control. Columns: High Impact, Medium Impact, Low Impact
What is hypothesis testing? - ANSWERS-A statistical method that
uses sample data to evaluate a hypothesis about a population. Testing
tells us whether there exists statistically significant difference between
the data sets for us to consider the to represent different distribution.
What are the steps in hypothesis testing? - ANSWERS-1. Determine
appropriate hypothesis test
2. Stat the null and alternate hypothesis
, 3. Perform the test & identify the P-Value
4. Interpret results - accept or reject hypothesis
Describe the null hypothesis - ANSWERS-The null hypothesis always
supports the status quo. It is the opposite of the alternate hypothesis.
Describe the alternative hypothesis - ANSWERS-specifies a
relationship that the researcher expects to find (example: the
performance of Traner A is not equal to the performance of Trainer B)
What is the guru mantra for hypothesis testing? - ANSWERS-If the p-
value is low, the null must go. If the p-value is high, the null must fly.
What is correlation coefficient? - ANSWERS-Provides a statistical
measure of how closely two things vary together and how well one
predicts the other. Values or r range between -1 and +1. Positive value
indicates a positive correlation, negative value indicates a negative
correlation.
What is regression analysis? - ANSWERS-A statistical process for
estimating the relationships among variables. Can be performed when
both X & Y variables are continuous.
What is the Chi-square test? - ANSWERS-Checks whether a
distribution is significantly different than an expected or theoretical
distribution. Performed when both variables are discrete. Example
(voters' gender and political party preference).
EXAM QUESTIONS AND
ANSWERS 2026 - 2027
Describe Sigma Shift - ANSWERS-The long-term deterioration of
process performance
What does DUDO stand for? - ANSWERS-Defects
Units
Defectives
Opportunity for Errors
How is Defects per Opportunity (DPO) calculated? - ANSWERS-
Number of Defects over Opportunity for Error * Number of Units
What does a fishbone diagram help to identify? - ANSWERS-The
trivial many root causes. Identify possible causes for an effect or
problem.
What are the major categories of a fishbone diagram? (5M's) -
ANSWERS-Machines
Manpower
Methods
Material
,Mother Nature
What is a box plot? - ANSWERS-a graphical summary of data that is
based on a five-number summary.
Highest Value
Third Quartile
Median
First Quartile
Lowest Value
What is a scatterplot? - ANSWERS-A graphed cluster of dots, each of
which represents the values of two variables. Displays relationships or
associations between the two variables.
What is a control impact matrix? - ANSWERS-A prioritization tool
that is used in conjunction with brainstorming. Rows: In-Control,
Out-of-Control. Columns: High Impact, Medium Impact, Low Impact
What is hypothesis testing? - ANSWERS-A statistical method that
uses sample data to evaluate a hypothesis about a population. Testing
tells us whether there exists statistically significant difference between
the data sets for us to consider the to represent different distribution.
What are the steps in hypothesis testing? - ANSWERS-1. Determine
appropriate hypothesis test
2. Stat the null and alternate hypothesis
, 3. Perform the test & identify the P-Value
4. Interpret results - accept or reject hypothesis
Describe the null hypothesis - ANSWERS-The null hypothesis always
supports the status quo. It is the opposite of the alternate hypothesis.
Describe the alternative hypothesis - ANSWERS-specifies a
relationship that the researcher expects to find (example: the
performance of Traner A is not equal to the performance of Trainer B)
What is the guru mantra for hypothesis testing? - ANSWERS-If the p-
value is low, the null must go. If the p-value is high, the null must fly.
What is correlation coefficient? - ANSWERS-Provides a statistical
measure of how closely two things vary together and how well one
predicts the other. Values or r range between -1 and +1. Positive value
indicates a positive correlation, negative value indicates a negative
correlation.
What is regression analysis? - ANSWERS-A statistical process for
estimating the relationships among variables. Can be performed when
both X & Y variables are continuous.
What is the Chi-square test? - ANSWERS-Checks whether a
distribution is significantly different than an expected or theoretical
distribution. Performed when both variables are discrete. Example
(voters' gender and political party preference).
