The time required to travel downtown at 10 a.m.on Monday morning is known to be normally distributed with a mean of 40 minutes and a standard deviation of 5 minutes.What is the probability that it will take more than 40 minutes?
A)0.2500
B)0.0625
C)1.000
D)0.5000

Question

Quizplus · Accepted Answer

Since the distribution is normal and we are looking for the probability of a time greater than the mean (40 minutes), this corresponds to 50% of the distribution, as the mean divides a normal distribution into two equal halves.

The Time Required to Travel Downtown at 10 A