10 The zvalue for a standard normal distribution A is alway

10.          The z-value for a standard normal distribution ________.

A.            is always positive

B.            is always equal to zero

C.            can be either positive or negative

D.            is always equal to the value of the population mean

Solution

It is OPTION C:

C. can be either positive or negative

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It can be positive if a score is greater than the mean, and negative if a score is less than the mean.