Lean Six Sigma Green Belt Measure Phase and Statistics Questions and Answers Flashcards
6 cards from real Lean Six Sigma Green Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Lean Six Sigma Green Belt Measure Phase and Statistics Questions and Answers flashcards as text
In a Measure phase data collection plan, what should be defined FIRST?
Answer: The operational definition of what is being measured
An operational definition ensures everyone measures the same thing the same way, which is foundational before determining sample size or tools.
A process produces 12 defects in 500 units inspected, with each unit having 8 opportunities for defects. What is the DPMO?
Answer: 3,000
DPMO is calculated as (12 defects / (500 units × 8 opportunities)) × 1,000,000 = 3,000 DPMO.
Which graphical tool is BEST for determining whether a dataset follows a normal distribution?
Answer: Normal probability plot
A normal probability plot displays data points against a theoretical normal line, making deviations from normality visually apparent.
What does a p-value of 0.03 indicate when the significance level (alpha) is set at 0.05?
Answer: Reject the null hypothesis because the result is statistically significant
Since 0.03 is less than the alpha of 0.05, there is sufficient evidence to reject the null hypothesis.
Which sampling method divides the population into subgroups and then randomly samples from each subgroup?
Answer: Stratified sampling
Stratified sampling ensures representation from each subgroup by dividing the population into strata and sampling from each one.
What is the relationship between process capability index Cp and specification width?
Answer: Cp = (USL - LSL) / (6 × standard deviation)
Cp compares the specification width (USL minus LSL) to the process spread (six standard deviations), measuring potential capability.