SOCR EduMaterials AnalysisActivities FlignerKilleen

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

This example is based on a dataset from the R package under the library MASS. The dataset's name is InsectSprays. In SOCR_EduMaterials_AnalysisActivities_FlignerKilleen#InsectSprays_dataset this dataset, there are two variables: count, which is quantitative, and spray, a factor of six groups, denoted by A to F.

The analysis steps:

1. 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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2. Click on the Mapping tab to map the groups you would like to include in the analysis. Select at least two groups.

3. 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 } Translate this page: (default) Deutsch Español Français Italiano Português 日本語 България الامارات العربية المتحدة Suomi इस भाषा में Norge 한국어 中文 繁体中文 Русский Nederlands Ελληνικά Hrvatska Česká republika Danmark Polska România Sverige