A plant manager knows that the number of boxes of supplies received weekly is normally distributed with a mean of 200 and a standard deviation of 20. What percentage of the time will the number of boxes of supplies that arrive be greater than 210 or less than 180?
A) 69.15%
B) 46.72%
C) 19.15%
D) 15.87%

Question

Quizplus · Accepted Answer

P(x > 210) + P(x < 180) = P(z > .5) + P(z < −1) = (1.00 − .6915) +.1587 = .4672

A Plant Manager Knows That the Number of Boxes of Supplies