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

Nov 30, 2017

Assumptions/ Requirements for performing an F-test

Explanation:

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 $\sigma {1}^{2}$ to $\sigma {2}^{2}$ should be equal to or greater than 1. (where $\sigma {1}^{2}$ > $\sigma {2}^{2}$)
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.