What Is The Formula Of Z Score?

What is the formula of z score?

z-score formulae

Population z-score:

\boxed{z=\frac{x-\mu}{\sigma}}\\\\where,\\z=z-value\\x=raw\:score\\\mu=population\:mean\\\sigma=population\:standard\:deviation

Sample z-score:

\boxed{z=\frac{x-\bar{x}}{s}}\\\\where,\\z=z-value\\x=raw\:score\\\bar{x}=sample\:mean\\s=sample\:standard\:deviation


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