Given that z is a standard normal random variable, a value of z that is equal to zero indicates that the standard deviation of z is zero also.

Name: Given that z is a standard normal random variable, a value of z that is equal to zero indicates that the standard deviation of z is zero also.
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Quizplus · Accepted Answer

A standard normal random variable always has a standard deviation of 1, not 0. A value of z equal to 0 indicates that the mean of the distribution is being observed.

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