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The F test for Comparing Two Normal Variances: Correct and Incorrect Calculation of the Two‐Sided p ‐value?
Author(s) -
Gallagher James
Publication year - 2006
Publication title -
teaching statistics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.425
H-Index - 13
eISSN - 1467-9639
pISSN - 0141-982X
DOI - 10.1111/j.1467-9639.2006.00244.x
Subject(s) - value (mathematics) , statistics , p value , mathematics , simple (philosophy) , test (biology) , software , statistical hypothesis testing , normal distribution , statistical software , computer science , paleontology , philosophy , epistemology , biology , programming language
Summary 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.