Why are z-scores used to check for outliers?
A) They standardize scores for a known mean and standard deviation, allowing comparison.
B) They allow you to allocate letters for missing values.
C) A z-score is an outlier.
D) They standardize scores in order to convert them to values closer to the mean.

Question

Quizplus · Accepted Answer

Z-scores are used to standardize scores for a known mean and standard deviation, allowing comparison. This makes it easier to identify outliers as scores that are far from the mean (usually defined as two or three standard deviations away).

Why Are Z-Scores Used to Check for Outliers