F Test

F test is a test for the null hypothesis that two normal populations have the same variance.

Form

• Variablenum

  Select one numerical variables you want to test.

• Factor

  Select a dichotomous variable as factor which split your data into two groups.

• Confidence Interval

  Determine the confidence interval for the test.

Example

You can use schooldays dataset to compare the variance of absent between dichotomous groups (race, sex, or learner).

Try it »