# F Test Calculator

**The F test calculator compares the equality of two variances.**.

It also validates the data normality, checks the test power, identify the outliers and generates the R syntax.

## F test calculator

**Target**: To check if the difference between the population's standard deviations of two groups is significance, using sample data

The f statistic calculator compute the p-value, the F statistic, and the test power.

Hypotheses

H

_{0}: σ_{1}= σ_{2}H

_{1}: σ_{1}≠ σ_{2}F statistic

Fn_{1}-1,n_{2}-1 = | S_{1}^{2} |

S_{2}^{2} |

F distribution

## Assumptions

Normal distribution - the F test for variances is very sensitive to the normality assumption. |

## Required Sample Data

S_{1}, S_{2} -Sample standard deviations of group1 and group2. | |

n_{1}, n_{2} - Sample size of group1 and group2. |