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3 results for “standard deviation”

Formulae (3)

\sigma = \sqrt{\frac{1}{n}\sum_{i=1}^{n}(x_i-\bar{x})^2}

Square root of the variance; typical spread.

z = \frac{x - \mu}{\sigma}

Number of standard deviations a value is from the mean.

SE = \frac{\sigma}{\sqrt{n}}

Standard deviation of the sample mean.