Calculating standard deviation step by step

There are a few different formulas for calculating a Z score. Since the mean and standard deviation of the population are known, you can calculate a

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How to interpret Z-scores (with examples)

Compute the areas under the standard curve. This calculator computes four different areas under the standard curve based on the Z score you enter.

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Z score

Since the z-score is positive, that means that the The value of X X X X is 1.75 standard deviations to the right of its mean, to be more precise.

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Calculate Z scores

any raw score of X. Simply enter its raw score, its population mean, as well as its standard deviation and click Calculate Z.
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