For a standard normal distribution, the probability of z ≤ 0 is
A) zero
B) -0.5
C) 0.5
D) one

Name: For a standard normal distribution, the probability of z ≤ 0 is A) zero B) -0.5 C) 0.5 D) one
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Question

Quizplus · Accepted Answer

By definition, a standard normal distribution has mean 0 and variance 1. The area under the curve to the left of 0 is exactly 0.5, because the distribution is symmetric. Therefore, the probability of z ≤ 0 is 0.5.

For a Standard Normal Distribution, the Probability of Z ≤