Whereas if Z Score = 0, it means the value is identical to the mean.Ī Z Score can be either positive or negative depending on whether the score lies above the mean (in which case it is positive) or below the mean (in which case it is negative) Which means that if Z Score = 1 then that value is one standard deviation from the mean. Meaning in simple terms, it is Z Score that gives you an idea of a value’s relationship to the mean and how far from the mean a data point is.Ī Z Score is measured in terms of standard deviations from the mean. But before we take a look at the formula, let us understand what the Z Score is What is a Z Score?Ī Z Score, also called as the Standard Score, is a measurement of how many standard deviations below or above the population mean a raw score is. It is the Z-Score that gets mapped across the Z-Table and is usually either pre-provided or has to be derived using the Z Score formula. To use the Z-Tables however, you will need to know a little something called the Z-Score. Note: Feel free to use and share the above images as long as you provide attribution to our site by crediting a link to How to use the Z Score Formula

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