A negative value of z indicates that
A) the number of standard deviations of an observation is to the right of the mean.
B) the number of standard deviations of an observation is to the left of the mean.
C) a mistake has been made in computations, since z cannot be negative.
D) the data has a negative mean.

Question

Quizplus · Accepted Answer

A negative value of z indicates that the number of standard deviations of an observation is to the left of the mean. This is because the formula for calculating z-score involves subtracting the mean from the observation, which results in a negative value if the observation is less than the mean. A negative z-score represents a value that is below the mean.

A Negative Value of Z Indicates That