This is a parametric test that evaluates whether or not two populations have equal variances.
- The data from two independent samples/groups should be stored in separate numeric columns. The number of observations can be the same or different for the two variables.
- Most implementations of the F-test generate an F value >= 1 by adopting the convention that the F statistic is always calculated with the
largest variance in the numerator, and therefore only the right one-tailed test is employed (F-max test).
Aabel does not limit hypothesis testing in this manner and allows all possible hypotheses to be tested.
For every hypothesis, both p values and critical F values for the prescribed α value are provided.
(see the example table report below).
