Given that z is a standard normal random variable,and that the area to the right of z is 0.9066,then the value of z must be:
A) 1.32.
B) -1.32.
C) 0.66.
D) -0.66.

Question

Quizplus · Accepted Answer

Since the area to the right of z is 0.9066, the area to the left of z must be 1-0.9066 = 0.0934. Looking at the standard normal distribution table (or using a calculator), we can find that the z-score corresponding to an area of 0.0934 to the left is approximately -1.32. Therefore, the value of z must be -1.32.

Given That Z Is a Standard Normal Random Variable,and That