The z score is a number, expressed in standard deviation units,that shows a score's deviation from the mean.

Name: The z score is a number, expressed in standard deviation units,that shows a score's deviation from the mean.
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The z score is calculated by subtracting the mean from the score and dividing the result by the standard deviation. It represents the number of standard deviations that a score is above or below the mean, and is expressed in standard deviation units.

The Z Score Is a Number, Expressed in Standard Deviation