Todd takes an achievement test that yields standard scores. The mean of the test scores is 200,and the standard deviation is 50. If Todd does better than 84% of the people his age who take the test,his standard score is:
A)150.
B)200.
C)250.
D)300.

Question

Quizplus · Accepted Answer

A standard score of 250 corresponds to the 84th percentile in a normal distribution with a mean of 200 and a standard deviation of 50.

Todd Takes an Achievement Test That Yields Standard Scores