The STANDARD-DEVIATION function returns a numeric value that approximates
the standard deviation of its arguments.
The function type is numeric.
___ Format _____________________________________________________________
| <____________ |
| >>__FUNCTION STANDARD-DEVIATION__(____argument-1_|__)_______________>< |
Must be class numeric.
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 difference between each argument-1 and the arithmetic mean of the
argument-1 series is calculated and squared.
- The values obtained are then added together. This quantity is divided
by the number of values in the argument-1 series.
- The square root of the quotient obtained is then calculated. The
returned value is the absolute value of this square root.
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