The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of .2 inches. What is the probability that a sheet selected at random will be less than 29.75 inches long?
A) .8944
B) .1056
C) .9332
D) .0668

Question

Quizplus · Accepted Answer

P(z ≤ [29.75 − 30.05]/.2) = P(Z ≤ −1.5) = .0668

The Population of Lengths of Aluminum-Coated Steel Sheets Is Normally