F-test
Calculates the F-Test of two data samples.
To access this command...
Choose Data - Statistics - F-test
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.
Data
Variable 1 range: The reference of the range of the first data series to analyze.
Variable 2 range: The reference of the range of the second data series to analyze.
Results to: The reference of the top left cell of the range where the test will be displayed.
Grouped By
Select whether the input data has columns or rows layout.
Example
The following table has two data sets.
| | A | B | | | ---- | -- | -- | | 1 | 28 | 19 | | 2 | 26 | 13 | | 3 | 31 | 12 | | 4 | 23 | 5 | | 5 | 20 | 34 | | 6 | 27 | 31 | | 7 | 28 | 31 | | 8 | 14 | 12 | | 9 | 4 | 24 | | 10 | 0 | 23 | | 11 | 2 | 19 | | 12 | 8 | 10 | | 13 | 9 | 33 |
Results for F-Test:
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 |