# Statistics > Hypothesis Tests > 2-Population Variance

This utility performs calculations for testing claims about the two population variances. The null hypothesis of a claim about the two population proportions σ12 and σ22 is σ12 = σ22. The alternative hypothesis can be one of the following: σ12 < σ22, σ12 > σ22, or σ12 ≠ σ22.

The test statistic F is equal to σ12 / σ22.

The test statistic F, p-Value, and critical values of the F distribution given a user-specified significance level are displayed as results.

### Dialog Inputs

The sample data can be inputted in one of three ways:

- Samples in one column: The population labels of samples are in one column of the Datasheet, and the individual samples are in another column.
- Samples in two columns: The samples of the two population are in two separate columns.
- Summarized sample data: The sample size and standard deviation/variance of each sample are provided (instead of individual sample values).

The confidence level must be between 0 and 1. For example, enter 0.95 for a 95% confidence level.

The Alternative Hypothesis can be one of the following forms: Less than (σ12 < σ22), Not Equal to ( σ12 ≠ σ22), or Greater than (σ12 > σ22).