Given that Z is a standard normal random variable,a negative value of Z indicates that the standard deviation of z is negative.

Name: Given that Z is a standard normal random variable,a negative value of Z indicates that the standard deviation of z is negative.
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Quizplus · Accepted Answer

A negative value of Z does not indicate a negative standard deviation. It simply means that the observed value is below the mean of the standard normal distribution. The standard deviation of Z is always positive and equal to 1.

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