What z-score is associated with the highest 60% of a normal distribution?
A) -.25
B) +.25
C) -2.51
D) +2.51

Question

Quizplus · Accepted Answer

A z-score of -.25 is associated with the highest 60% of a normal distribution because a z-score represents the number of standard deviations a data point is from the mean. A negative z-score indicates a value below the mean, and since 50% of the data lies above the mean in a normal distribution, a z-score of -.25 slightly increases this percentage to 60%, indicating the data point is closer to the mean but still below it.

What Z-Score Is Associated with the Highest 60% of a Normal