The numbers are only estimations. There is no agreement what effect size is small/medium/large">Effect:
You may copy the data from Excel, Google sheets or any tool that separate data with Tab and Line Feed.
Copy one block of 2 consecutive columns includes the header, and paste below. Click to see example:
The tool will ignore empty cells or non-numeric cells
|Normal distribution - the F test for variances is very sensitive to the normality assumption.|
|S1, S2 -Sample standard deviations of group1 and group2.|
|n1, n2 - Sample size of group1 and group2.|
The tool calculates the p-value, the F statistic and the test power.
The following R code should produce the same results: