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  • Skip Navigation LinksStandard Score (Z-score) Formulas

Standard Score (Z-score) Formula

Below you will find descriptions and details for the formula that is used to compute standard scores (z-scores) in situations where the population mean and standard deviation are known.

Z-value (standard normal score):
Z-value (standard normal score) formula
Variable definitions:
x = raw score to be standardized
μ = population mean
σ = population standard deviation
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