stats_standard_deviation
(PECL stats >= 1.0.0)
stats_standard_deviation — Returns the standard deviation
Description
stats_standard_deviation(array
$a, bool $sample = false): float
Returns the standard deviation of the values in a.
Parameters
-
a -
The array of data to find the standard deviation for. Note that all values of the array will be cast to float.
-
sample -
Indicates if
arepresents a sample of the population; defaults tofalse.
Return Values
Returns the standard deviation on success; false on failure.
Errors/Exceptions
Raises an E_WARNING when there are fewer than 2
values in a.
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