Which Standard Deviation & Variance to use in Excel (and SQL!).

A look at STDEV, STDEVP, VAR and VARP- Amy M., from Developing SQL Queries for SQL Server, writes… “I know there are two functions for standard deviation and for variance in Transact-SQL, but I can never remember when to use which.” You are so right, Amy. It is hard to know when to use STDEV […]
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