SOCR EduMaterials AnalysisActivities FlignerKilleen
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SOCR Analysis Activities - Fligner-Killeen Non-parametric Test
Overview of the test Fligner-Killeen
The Fligner-Killeen test is a non-parametric test comparing whether k samples have equal variances. Some alternative statistical tests, for example the analysis of variance, assume that variances are equal across groups or samples.
Examples
Example 1
This example is based on a dataset from the R package under the library MASS. The dataset's name is InsectSprays. In this dataset, there are two variables: count, which is quantitative, and spray, a factor of six groups, denoted by A to F. Here are the analysis steps for this example:
- As you start the SOCR Analyses Applet, click on Fligner-Killeen Test from the combo box in the left panel. Next, click on Example 2 and then the Data tab on the top of the right panel. You will see something like below. The data have been divided into 6 columns by groups.
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- Click on the Mapping tab to map the groups you would like to include in the analysis. Select at least two groups.
- Now you will click on Compute to let the program produce the results. Click on Result to view the results.
- Note: if you happen to click on the "Clear" button in the middle of the procedure, all the data will be cleared out. Simply start over from step 1.
InsectSprays dataset
| Index | count | spray |
| 1 | 10 | A |
| 2 | 7 | A |
| 3 | 20 | A |
| 4 | 14 | A |
| 5 | 14 | A |
| 6 | 12 | A |
| 7 | 10 | A |
| 8 | 23 | A |
| 9 | 17 | A |
| 10 | 20 | A |
| 11 | 14 | A |
| 12 | 13 | A |
| 13 | 11 | B |
| 14 | 17 | B |
| 15 | 21 | B |
| 16 | 11 | B |
| 17 | 16 | B |
| 18 | 14 | B |
| 19 | 17 | B |
| 20 | 17 | B |
| 21 | 19 | B |
| 22 | 21 | B |
| 23 | 7 | B |
| 24 | 13 | B |
| 25 | 0 | C |
| 26 | 1 | C |
| 27 | 7 | C |
| 28 | 2 | C |
| 29 | 3 | C |
| 30 | 1 | C |
| 31 | 2 | C |
| 32 | 1 | C |
| 33 | 3 | C |
| 34 | 0 | C |
| 35 | 1 | C |
| 36 | 4 | C |
| 37 | 3 | D |
| 38 | 5 | D |
| 39 | 12 | D |
| 40 | 6 | D |
| 41 | 4 | D |
| 42 | 3 | D |
| 43 | 5 | D |
| 44 | 5 | D |
| 45 | 5 | D |
| 46 | 5 | D |
| 47 | 2 | D |
| 48 | 4 | D |
| 49 | 3 | E |
| 50 | 5 | E |
| 51 | 3 | E |
| 52 | 5 | E |
| 53 | 3 | E |
| 54 | 6 | E |
| 55 | 1 | E |
| 56 | 1 | E |
| 57 | 3 | E |
| 58 | 2 | E |
| 59 | 6 | E |
| 60 | 4 | E |
| 61 | 11 | F |
| 62 | 9 | F |
| 63 | 15 | F |
| 64 | 22 | F |
| 65 | 15 | F |
| 66 | 16 | F |
| 67 | 13 | F |
| 68 | 10 | F |
| 69 | 26 | F |
| 70 | 26 | F |
| 71 | 24 | F |
| 72 | 13 | F |
See also
The Fligner-Killeen section of the SOCR EBook.
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