Given that z is a standard normal random variable, what is the value of z if the area to the left of z is 0.2345?
A) -0.72
B) 0.28
C) 0.72
D) -0.28

Question

Quizplus · Accepted Answer

The area to the left of z = 0.2345 corresponds to a z-score that is below the mean (since 50% of the area under the normal distribution curve is to the left of the mean). Looking up 0.2345 in a standard normal distribution table or using a calculator to find the z-score gives a value of approximately -0.72.

Given That Z Is a Standard Normal Random Variable, What