The weight losses for participants in a large exercise and diet study vary according to a Normal distribution with mean 14.5 pounds and standard deviation 3 pounds.
Approximately one-half of the participants in the study lose more than:
A) 2 pounds.
B) 16.5 pounds.
C) 12.5 pounds.
D) 14.5 pounds.

Question

Quizplus · Accepted Answer

Since the distribution is Normal, the mean (14.5 pounds) is the point at which half of the participants lose more and half lose less, due to the symmetric nature of the Normal distribution.

The Weight Losses for Participants in a Large Exercise and Diet