What must you know in order to perform an f-test?

1 Answer
Nov 30, 2017

Assumptions/ Requirements for performing an F-test


The theoretical assumptions on which an F-test is based are:

  1. The population for each sample must be normally distributed with identical mean and variance.
  2. All sample observations must be randomly selected and independent.
  3. The ratio of #sigma1^2# to #sigma2^2# should be equal to or greater than 1. (where #sigma1^2# > #sigma2^2#)
  4. Since the F-distribution is always formed by a ratio of squared values, it can never be negative.
  5. All F-distributions are uni-modal and are skewed to the right.