F Test Statistic. The simplest test statistic is the t test which determines if two means are significantly different. F test is to test equality of several means.
It s similar to a t statistic from a t test. The f statistic incorporates both measures of variability discussed above. Fisher initially developed t.
In statistics an f test of equality of variances is a test for the null hypothesis that two normal populations have the same variance.
Various statistical tests generate an f value. A statistical f test uses an f statistic to compare two variances s 1 and s 2 by dividing them. But the first and foremost thing to perform f test is that the data sets should have a normal distribution. The equation for comparing two variances with the f test is.
