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Z-Score: Definition, Formula and Calculation - Statistics How To A z-score (also called a standard score) gives you an idea of how far from the mean a data point is More technically, it’s a measure of how many standard deviations below or above the population mean a raw score is
Standard score - Wikipedia In statistics, the standard score or z-score is the number of standard deviations by which the value of a raw score (i e , an observed value or data point) is above or below the mean value of what is being observed or measured
How To Understand And Calculate Z-Scores – mathsathome. com To calculate the z-score, use the formula z= (x-μ) σ, where x is the raw score, μ is the mean and σ is the standard deviation In words, subtract the mean from the raw score and then divide by the standard deviation