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

##### 1 Answer

Nov 30, 2017

Assumptions/ Requirements for performing an F-test

#### Explanation:

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.