Your best friend takes an IQ test and tells you that s/he scored "average." Generalizing from the normal distribution of IQ scores, you know that your friend's score
A)was below 100.
B)was above 100.
C)was 100.
D)fell somewhere between 85 and 115.
E)fell somewhere between 115 and 130.

Question

Quizplus · Accepted Answer

IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. An "average" score typically falls within one standard deviation of the mean, which is between 85 and 115.

Your Best Friend Takes an IQ Test and Tells You