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MVPstats — z Score Calculations - Form

The z-Score Calculation Form performs z-Score calculations upon entry of a Mean, Standard Deviation, and X value or Area. The z-Score and the proportion (displayed in proportion, percent, parts per million, and parts per billion) above and below X or the value corresponding to the upper-tail area entered, for a normally distributed population, will be displayed.

The z-score is calculated by the following formula.



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