Suppose one individual in a certain population had a z-score of −2.Which of the following is true?
A)This is a bad thing because the individual is below average.
B)This individual's measurement is 2 standard deviations below the mean.
C)This individual's original measurement was a negative number.
D)All of the above are true.

Question

Quizplus · Accepted Answer

A z-score of -2 means that the individual's measurement is 2 standard deviations below the mean. It does not necessarily mean that the individual is below average, as the mean of the population could be above the individual's measurement. There is no information to suggest that the individual's original measurement was a negative number.

Suppose One Individual in a Certain Population Had a Z-Score