learn.howToCalculate

learn.whatIsHeading

Standard deviation measures how spread out the values in a dataset are from the mean. A low standard deviation means values cluster tightly; a high one means they are spread out. It is the square root of variance.

Trin-for-trin guide

1. 1Find the mean x̄
2. 2Subtract the mean from each value and square the result: (xᵢ − x̄)²
3. 3Average the squared differences (÷n for population, ÷(n−1) for sample)
4. 4Take the square root

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