In a standard normal distribution, the probability that Z is greater than zero is
A) 0.5.
B) equal to 1.
C) at least 0.5.
D) 1.96.

Question

Quizplus · Accepted Answer

In a standard normal distribution, the mean is 0, and the distribution is symmetric around the mean. Therefore, the probability that Z is greater than zero (i.e., above the mean) is exactly 0.5, as half of the distribution lies above zero and half below it.

In a Standard Normal Distribution, the Probability That Z Is