What must you know in order to perform an f-test?
Nov 30, 2017
Assumptions/ Requirements for performing an F-test
The theoretical assumptions on which an F-test is based are:
- The population for each sample must be normally distributed with identical mean and variance.
- All sample observations must be randomly selected and independent.
- The ratio of
#sigma1^2#to #sigma2^2#should be equal to or greater than 1. (where #sigma1^2#> #sigma2^2#)
- Since the F-distribution is always formed by a ratio of squared values, it can never be negative.
- All F-distributions are uni-modal and are skewed to the right.