IASSC Certified Lean Six Sigma Green Belt - ICGB Exam Questions [2026]

QUESTION NO: 1
The deviation of the measured value from the actual value is known as _____________.

A. Movement B. Bias C. Linearity D. Repeatability

Correct Answer: B

QUESTION NO: 2
Customers make a purchase decision based on a number of factors. In Lean Six Sigma we refer to these decision points as CTQ's which stands for __________.

A. Critical-to-quality B. Cost of the quantity C. Conspicuous time quandaries D. Conscious thought qualities

Correct Answer: A

QUESTION NO: 3
A Stable process is a process whose output is consistent over time. A primary tool used to analyze Stability would be a ________________.

A. Data Forward Plot B. Bag Plot C. Min/Max Plot D. Time Series Plot

Correct Answer: D

QUESTION NO: 4
Bias in Sampling is an error due to lack of independence among random samples or due to systematic sampling procedures.

A. True B. False

Correct Answer: A

QUESTION NO: 5
What is the Cycle Time, in seconds, for a process having a Throughput of 7,200 units per hour?

A. 10 B. 0.5 C. 2 D. 4

Correct Answer: B

QUESTION NO: 6
Hypothesis Testing can save time and help avoid high costs of experimental efforts by using existing data.

A. True B. False

Correct Answer: A

QUESTION NO: 7
When it comes to Control one of the most effective means of eliminating defects is to _________________ .

A. Train personnel often and thoroughly B. Keep a Six Sigma project going on the process at all times C. Have each process consist of no more than five steps D. Design defect prevention into the product

Correct Answer: D

QUESTION NO: 8
The generation of a Regression Equation is justified when we _____________. (Note: There are 4 correct answers).

A. When it is very expensive or too late to measure the output B. Know that there is a non-linear relationship between output and input(s) C. Need to understand how to control a process output by controlling the input(s) D. Expect the relationship to be Linear between the output and inputs E. Experience several process defects and have no other way to fix hem

Correct Answer: A,C,D,E

QUESTION NO: 9
After a Belt has put data through the smoothing process which chart would be used to look for trends in the data?

A. Multi-Vari Chart B. Pareto Chart C. X bar Chart D. Moving Average Chart

Correct Answer: D

QUESTION NO: 10
The term FMEA is an abbreviation for Failures Measure Effective Automation.

A. True B. False

Correct Answer: B

QUESTION NO: 11
To draw inferences about a sample population being studied by modeling patterns of data in a way that accounts for randomness and uncertainty in the observations is known as ____________________.

A. Sequential Inference B. Physical Modeling C. Influential Analysis D. Inferential Statistics

Correct Answer: D

QUESTION NO: 12
For the data shown here a Belt suspects the three grades are supplying the same results. Which statement(s) are true for proper Hypothesis Testing?

A. An appropriate test to test Central Tendency is the Mood's Median test B. An appropriate test to test Central Tendency is the Levene's test C. The most appropriate Central Tendency to test is the Means D. An appropriate test to test Central Tendency is the ANOVA test

Correct Answer: A

QUESTION NO: 13
Significant variation in process performance is a consequence of several causes that can be classified using which of the terminologies shown. (Note: There are 2 correct answers).

A. Special B. Uneducated C. Random D. Common E. Vital

Correct Answer: A,D

QUESTION NO: 14
When a Belt is analyzing sample data she should keep in mind that 95% of Normally Distributed data is within +/- 2 Standard Deviations from the Mean.

A. True B. False

Correct Answer: A