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# F-test

Execute F-test, which checks the difference of variances between groups.

You can access from 'Add' (Plus) button.

- Value Column - Numeric column whose variances is calculated.
- Group Column - Label column of 2 groups.

- Population Variance Ratio (Optional) - The default is 1. The hypothesized population variances ratio.
- Type of Alternative Hypothesis (Optional) - The default is "two.sided". What kind of alternative hypothesis to be used. This can be
- "two.sided"
- "less"
- "greater"

- Confidence Level (Optional) - The default is 0.95. The level of confidence interval.
- Subset (Optional) - a vector to specify a subset of observations to be used.
- NA Action (Optional) - The default is "na.fail". This changes the behaviour of NA data. Can be one of the following.
- "na.omit"
- "na.fail"
- "na.exclude"
- "na.pass"
- NULL

Take a look at the reference document for the 'var.test' function from base R for more details on the parameters.

Last modified 2yr ago