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Calculates the F-Test of two data samples.
A F-test is any statistical test based on the F-distribution under the null hypothesis.
For more information on F-tests, refer to the corresponding Wikipedia article.
Variable 1 range: The reference of the range of the first data series to analyse.
Variable 2 range: The reference of the range of the second data series to analyse.
Results to: The reference of the top left cell of the range where the test will be displayed.
The following table shows the F-Test for the data series above:
| Ftest | ||
| Alpha | 0.05 | |
| Variable 1 | Variable 2 | |
| Mean | 16.9230769231 | 20.4615384615 | 
| Variance | 125.0769230769 | 94.4358974359 | 
| Observations | 13 | 13 | 
| df | 12 | 12 | 
| F | 1.3244637524 | |
| P (F<=f) right-tail | 0.3170614146 | |
| F Critical right-tail | 2.6866371125 | |
| P (F<=f) left-tail | 0.6829385854 | |
| F Critical left-tail | 0.3722125312 | |
| P two-tail | 0.6341228293 | |
| F Critical two-tail | 0.3051313549 | 3.277277094 |