A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard of 20.
-What percentage of the time will the number of boxes received weekly be between 180 and 210?
A)5328
B)5987
C)4913
D)7750
E)5332

Question

Quizplus · Accepted Answer

The z-score for 180 is (180-200)/20 = -1. The z-score for 210 is (210-200)/20 = 0.5. The area under the normal curve between z-scores of -1 and 0.5 is 0.5328.

A Plant Manager Knows That the Number of Boxes of Supplies