In a standard normal distribution the probability of z being less than or equal zero is
A) 0.0000
B) much larger than 1
C) there is no answer to this question, since the value of the mean is not known
D) 0.5000

Question

Quizplus · Accepted Answer

In a standard normal distribution, the mean is 0 and the standard deviation is 1. Therefore, the area to the left of the mean (z=0) is 0.5000 or 50%.

In a Standard Normal Distribution the Probability of Z Being