Measuring the Standard Deviation of a Population - Advanced SQL Engine - Teradata Database

SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-28
dita:mapPath
SQL_Functions__Expressions__and_Predicates.Upload_071421/djk1612415574830.ditamap
dita:ditavalPath
SQL_Functions__Expressions__and_Predicates.Upload_071421/wrg1590696035526.ditaval
dita:id
B035-1145
lifecycle
previous
Product Category
Teradata Vantageā„¢

If your data represents the entire population for the variable, then use the STDDEV_POP function. For information, see STDDEV_POP.

As the sample size increases, the values for STDDEV_SAMP and STDDEV_POP approach the same number, but you should use the more conservative STDDEV_SAMP calculation unless you are absolutely certain that your data constitutes the entire population for the variable.