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
Which measure of central tendency is most affected by extreme outliers in a data set?
Answer: Mean
The mean is calculated using all data values, so extreme outliers pull it significantly higher or lower.
A process has a standard deviation of 3.5. What is the variance?
Answer: 12.25
Variance is the square of the standard deviation, so 3.5² = 12.25.
In a Pareto chart, what does the cumulative line represent?
Answer: The running total percentage of all categories combined
The cumulative line shows the running total percentage, helping identify the vital few categories that account for most of the effect.
What type of data is represented by categories such as defect types or machine identifiers?
Answer: Attribute data
Attribute data (also called categorical data) classifies items into categories rather than measuring them on a numeric scale.
When constructing a histogram, what does the height of each bar represent?
Answer: The frequency of data points within that interval
Each bar's height shows how many data points fall within that particular interval or bin.
Which graphical tool displays the five-number summary (minimum, Q1, median, Q3, maximum)?
Answer: Box-and-whisker plot
A box-and-whisker plot visually displays the minimum, first quartile, median, third quartile, and maximum of a data set.