If z is a standard normal variable, find the probability.
-The probability that z lies between 0 and 3.01
A) 0.9987
B) 0.1217
C) 0.5013
D) 0.4987

Question

Quizplus · Accepted Answer

The probability that a standard normal variable z lies between 0 and 3.01 is the area under the standard normal curve from 0 to 3.01. This is equal to the cumulative probability at 3.01 minus the cumulative probability at 0. The cumulative probability at 3.01 is approximately 0.9987, and at 0 it is 0.5. Therefore, the probability is 0.9987 - 0.5 = 0.4987.

If Z Is a Standard Normal Variable, Find the Probability