The STDEVA function returns the standard deviation, a measure of dispersion, of a
collection of values that may include text and Boolean values, based on the sample
(unbiased) variance.

STDEVA(value, value…)

value: A value. value can contain any value type. All numeric values must be of the
same type. You cannot mix numbers, dates, and duration values.

value…: One or more additional values (a minimum of two values are required).
All numeric values must be of the same type. You cannot mix numbers, dates, and
duration values.

Usage Notes

It is appropriate to use STDEVA when the specified values represent only a sample

of a larger population. If the values you are analyzing represent the entire collection
or population, use the STDEVPA function.
STDEVA assigns a value of 0 to any text value, 0 to the Boolean value FALSE, and 1

to the Boolean value TRUE and includes them in the computation. Empty cells are
ignored. If you do not want to include text or Boolean values in the computation,
use the STDEV function.
The standard deviation is the square root of the variance returned by the VARA function.