Hi DM,
StDev, StDevP Functions Help
Assistance > Access 2003 > Creating and Working with Databases and Objects
Database Objects > Queries > Microsoft Jet SQL Reference > Functions
Return estimates of the standard deviation for a population or a population
sample represented as a set of values contained in a specified field on a
query.
Syntax
StDev(expr)
StDevP(expr)
The expr placeholder represents a string expression identifying the field
that contains the numeric data you want to evaluate or an expression that
performs a calculation using the data in that field. Operands in expr can
include the name of a table field, a constant, or a function (which can be
either intrinsic or user-defined but not one of the other SQL aggregate
functions).
Remarks
The StDevP function evaluates a population, and the StDev function
evaluates a population sample.
If the underlying query contains fewer than two records (or no records, for
the StDevP function), these functions return a Null value (which indicates
that a standard deviation cannot be calculated).
You can use the StDev and StDevP functions in a query expression. You can
also use this expression in the SQL property of a QueryDef object or when
creating a Recordset object based on an SQL query.
For Further Information :
http://office.microsoft.com/en-us/assistance/HP010322691033.aspx
Please let me know has this helped You...
Thank you...
Raghu...
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