The mean score on a test of agreeableness is 27 with a standard deviation of 8. Rudolfo got a score of 25 on this test. What is his z score?
A) -0.25
B) -0.40
C) -2.00
D) There is not enough information to tell.

Question

Quizplus · Accepted Answer

The z score is calculated by subtracting the mean from the individual score and then dividing by the standard deviation: $z = \frac{(25 - 27)}{8} = \frac{-2}{8} = -0.25$.

The Mean Score on a Test of Agreeableness Is 27