FREE Lean Six Sigma Green Belt Basic Statistical Tools 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 FREE Lean Six Sigma Green Belt Basic Statistical Tools Questions and Answers flashcards as text
What is the primary purpose of a scatter diagram in Six Sigma?
Answer: To show the relationship between two variables
A scatter diagram plots paired data points to reveal potential correlations or relationships between two variables.
A data set has values: 4, 7, 7, 9, 12. What is the median?
Answer: 7
With five values arranged in order, the median is the middle (third) value, which is 7.
Which sampling method divides the population into subgroups and then randomly samples from each subgroup?
Answer: Stratified sampling
Stratified sampling divides the population into homogeneous subgroups (strata) and takes random samples from each to ensure representation.
What does a correlation coefficient of -0.92 indicate about two variables?
Answer: A strong negative relationship
A correlation coefficient close to -1 indicates a strong negative (inverse) linear relationship between the two variables.
In descriptive statistics, what does the range measure?
Answer: The spread between the maximum and minimum values
The range is calculated by subtracting the minimum value from the maximum value, providing the simplest measure of data spread.
Which chart is most appropriate for tracking a single process metric over time to detect trends or shifts?
Answer: Run chart
A run chart plots data points in time order, making it ideal for detecting trends, shifts, or cycles in a process.