ANS85 The MEAN Function

The MEAN function returns a numeric value that is the arithmetic mean (average) of its arguments. The type of this function is numeric.

General Format
Arguments
  1. Argument-1 must be class numeric.
Returned Values
  1. The returned value is the arithmetic mean of the argument-1 series.
  2. The returned value is defined as the sum of the argument-1 series divided by the number of occurrences referenced by argument-1.
  3. Floating-point format is used for numeric non-integer results.