## population standard deviation

the population standard deviation, sigma, equals the square root of: one over N, multiplied by the sum of all squared differences between each value, i, of x and the population mean, mu

The population standard deviation is a parameter that describes the spread, or width, of a distribution, it is the mean or expected difference between any given value drawn from the population and the population mean

Matlab | std(x,1) |
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Excel | =stdevp(x) |