ASQ Six Sigma Green Belt 2

Question 1

In Six Sigma, what does the term 'sigma level' measure?

Accepted Answer

The number of standard deviations between the process mean and the nearest specification limit

Answer

The number of defects per unit produced

Answer

The percentage of variation explained by the X variables

Answer

The ratio of tolerance to process spread

Question 2

Which tool is used in the Define phase to identify all stakeholders and their requirements for a Six Sigma project?

Accepted Answer

SIPOC diagram

Answer

Control chart

Answer

Failure Mode and Effects Analysis (FMEA)

Answer

Fishbone diagram

Question 3

What is the purpose of a Gage R&R study in the Measure phase?

Accepted Answer

To evaluate the repeatability and reproducibility of a measurement system

Answer

To identify root causes of defects

Answer

To establish baseline process capability

Answer

To prioritize potential causes using a Pareto chart

Question 4

A process has a Cp of 1.5 but a Cpk of 0.8. What does this indicate?

Accepted Answer

The process has adequate potential but is not centered within the specification limits

Answer

The process spread is too wide relative to the specification

Answer

The process is centered within specifications but has too much variation

Answer

The process is both centered and capable

Question 5

In hypothesis testing, a Type II error (beta error) occurs when:

Accepted Answer

A false null hypothesis is not rejected

Answer

A true null hypothesis is rejected

Answer

The p-value exceeds the significance level

Answer

The confidence interval includes zero

Question 6

Which of the following best describes the purpose of stratification in data analysis?

Accepted Answer

Separating data into subgroups to identify patterns or sources of variation

Answer

Ranking defects from most to least frequent

Answer

Plotting data over time to detect trends

Answer

Establishing control limits for a process

Question 7

What is the primary output of the Analyze phase in DMAIC?

Accepted Answer

Validated root causes of the problem

Answer

A list of potential solutions ranked by feasibility

Answer

Updated control plans and standard operating procedures

Answer

Baseline measurements of current process performance