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
What is the primary purpose of a measurement system analysis (MSA) in the Measure phase?
Answer: To evaluate the accuracy and precision of the measurement system
MSA evaluates whether the measurement system produces reliable and consistent data before using it for process analysis.
A process has a mean of 50 and a standard deviation of 5. What percentage of data falls within one standard deviation of the mean in a normal distribution?
Answer: 68.26%
The empirical rule states that approximately 68.26% of data in a normal distribution falls within plus or minus one standard deviation of the mean.
Which type of data would 'number of customer complaints per month' be classified as?
Answer: Discrete data
Count data such as number of complaints is discrete because it can only take whole number values.
What does a Gage R&R study specifically measure?
Answer: Repeatability and reproducibility of a measurement system
Gage R&R quantifies variation from the measurement device (repeatability) and variation from different operators (reproducibility).
If a dataset has a positively skewed distribution, which relationship between the measures of central tendency is correct?
Answer: Mean > Median > Mode
In a positively skewed distribution, the tail extends to the right, pulling the mean higher than the median, which is higher than the mode.
What is the correct formula for calculating the coefficient of variation (CV)?
Answer: (Standard deviation / Mean) × 100
The coefficient of variation expresses the standard deviation as a percentage of the mean, allowing comparison of variability across different scales.