ASQ Six Sigma Green Belt 3

Question 1

In Design of Experiments (DOE), what is a 'main effect'?

Accepted Answer

The average change in the response when a factor moves from its low to high level

Answer

A main effect is the average impact of a single factor on the response variable, independent of other factors.

Question 2

Which control chart is most appropriate for monitoring the number of defects per unit when the sample size varies?

Accepted Answer

u-chart

Answer

The u-chart tracks the average number of defects per unit and is designed to handle varying subgroup sizes.

Question 3

A team uses a Pugh Concept Selection Matrix. What is its primary purpose in the Improve phase?

Accepted Answer

To systematically compare solution alternatives against selection criteria

Answer

The Pugh matrix evaluates solution alternatives relative to a reference concept across multiple weighted criteria, guiding objective solution selection.

Question 4

What is the relationship between confidence level and significance level (alpha) in hypothesis testing?

Accepted Answer

Confidence level = 1 - alpha

Answer

A 95% confidence level corresponds to a 5% significance level (alpha = 0.05), since confidence level = 1 − alpha.

Question 5

In a scatter diagram showing a strong positive correlation, what does this indicate?

Accepted Answer

As X increases, Y also tends to increase

Answer

A positive correlation means X and Y move in the same direction, though correlation does not establish causation.

ASQ - American Society for Quality Certification Practice Test

ASQ - American Society for Quality Certification Practice Test

ASQ Six Sigma Green Belt 3