Suppose that the waiting time for a license plate renewal at a local office of a state motor vehicle department has been found to be normally distributed with a mean of 30 minutes and a standard deviation of 8 minutes.What is the probability that a randomly selected individual will have a waiting time no more than 22 minutes?
A).1587
B).9977
C).8413
D).0023

Question

Quizplus · Accepted Answer

The Z-score for 22 minutes is (22-30)/8 = -1. The probability of a Z-score being less than -1 in a standard normal distribution is approximately 0.1587.

Suppose That the Waiting Time for a License Plate Renewal