# SOCR EduMaterials AnalysisActivities FlignerKilleen

## Contents

## 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

Go to the SOCR Fligner-Killeen Non-parametric Test Applet. 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.
- Command-line driven execution of Fligner-Killeen Test.

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