STATS_STANDARD_DEVIATION(3) 1 STATS_STANDARD_DEVIATION(3)
stats_standard_deviation - Returns the standard deviation
SYNOPSIS
float stats_standard_deviation (array $a, [bool $sample = false])
DESCRIPTION
PARAMETERS
o $a
- The array of data to find the standard deviation for. Note that all values of the array will be cast to float.
o $sample
- Indicates if $a represents a sample of the population; defaults to FALSE.
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.
PHP Documentation Group STATS_STANDARD_DEVIATION(3)
