Which of the following correctly characterize the plausibility of Z-scores of a distribution calculated using the sample mean and deviation?
A) They must all be positive.
B) They must be positive and negative.
C) They must fall within -3 and +3.
D) 67% of scores must be positive.

Question

Quizplus · Accepted Answer

Z-scores can be positive or negative depending on whether the data point is above or below the mean, respectively. There is no requirement for Z-scores to be within a specific range or for a certain percentage to be positive.

Which of the Following Correctly Characterize the Plausibility of Z-Scores