The STANDARD-DEVIATION function returns a numeric value that approximates the standard deviation of its arguments.
The function type is numeric.
Format
.------------.
V |
>>-FUNCTION STANDARD-DEVIATION--(----argument-1-+--)-----------><
The returned value is the approximation of the standard deviation of the argument-1 series. The returned value is calculated as follows:
If the argument-1 series consists of only one value, or if the argument-1 series consists of all variable occurrence data items and the total number of occurrences for all of them is one, the returned value is zero.
The equivalent arithmetic expression for FUNCTION STANDARD-DEVIATION is:
FUNCTION SQRT (FUNCTION VARIANCE (argument-1))
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