Investment Studio > Expressions > Functions > Statistical > STDEV

float stdev(float data [, ...])

Returns the unbiased standard deviation of the arguments, i.e. an estimate of the standard deviation of a larger population from which the arguments are sampled (if the argument list contains the entire population, use stdevp instead).

All elements in the argument list are converted to floats, with exclusion if conversion fails. The list may contain array arguments, in which case each array element is treated as a separate list element.

Equivalent to sqrt(var(data [, ...])).

Example

The expression

=stdev(1, 7, 2, 5, 0, 3, 6, 6, 8, 3)

returns 2.68535120814971.

See also average, avedev, confidence, kurt, stdevp, var, varp.