Find a value of the standard normal random variable z, called z0, such that P(-z0 ≤ z ≤ z0) = 0.98.
A) 2.33
B) 1.645
C) 1.96
D) .99

Question

Quizplus · Accepted Answer

The area under the standard normal curve between -z0 and z0 is 0.98, which means that the area in each tail is 0.01. Using a standard normal table, we find that the z-score corresponding to an area of 0.01 in the upper tail is -2.33. Therefore, z0 = 2.33.

Find a Value of the Standard Normal Random Variable Z