## F-Distribution

The F distribution has a pair (df1 = , df2 = ) of numbers for the degree of freedom. The shape of the distribution is unimodal with a long right-hand tail. The critical point for the F distribution, denoted by , is provided separately for the lower tail and the upper tail.

The critical point is related to via the formula . Thus, an lower-tailed region can be found from another upper-tailed region, or vice versa.

Level (p-value) | |

Lower-tailed region | |

Upper-tailed region |

F-distribution table contains the selected critical values in a form of table.