The F test for Comparing Two Normal Variances: Correct and Incorrect Calculation of the Two-Sided p-value?


Authors: 
Gallagher, J.
Editors: 
Goodall, G.
Category: 
Volume: 
28(2)
Pages: 
58-60
Year: 
2006
Publisher: 
Teaching Statistics
Abstract: 

This article illustrates that not all statistical software packages are correctly calculating a p-value for the classical F test comparison of two independent Normal variances. This is illustrated with a simple example, and the reasons why are discussed. Eight different software packages are considered.

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