Folded f test and F Test

Sajid01 — Wed, 19 Dec 2018 00:40:37 GMT

Hello

Is there a difference between folded F test and Fisher F test.
(The new SAS Certification guide for statistical business analyst uses this term).

Re: Folded f test and F Test

PGStats — Wed, 19 Dec 2018 05:36:37 GMT

The folded F test is also called the F test of equality of variances, it is based on the F distribution.

https://en.wikipedia.org/wiki/F-test_of_equality_of_variances

The same F-test (sometimes called Fisher's F test) is also used in the context of ANOVA.

Both versions of the test are based on the ratio of variances. The folded version puts the greater variance at the numerator before comparing to the F distribution while the ANOVA test doesn't.

topic Re: Folded f test and F Test in Statistical Procedures

Folded f test and F Test

Re: Folded f test and F Test