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    Topic complex Statistical functions
    Function mean()
    Short Returns the arithmetical average of an expression for a database analyse
    Syntax MEAN(numerischer_Ausdruck)
    Parameter numeric_expression: any expression with direct field accesses.
    Return Sum of the single calculations of the numeric expression for every record of the analyse.
    See also:
    max() min() sum() count()
    Description Example:

    VAR mean_income : REAL

    ...
    FINDANDMARK(db,'income<>0','mean_income:=MEAN(income)')

    After executing the function mean_income has the average of all income specifications.

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       Last changed: 21.10.2004
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