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Given the following sample data, Complete parts a and b.
Based on the computations for the within- and between-sample variation, develop the ANOVA table and test the appropriate null hypothesis using alpha =0.01.
b. If warranted, use the Tukey-Kramer procedure to determine which populations have different means. Use a=0.01.
| Item | Group 1 | Group 2 | Group 3 | Group 4 |
|---|---|---|---|---|
| 1 | 19.1 | 29.5 | 18.7 | 21.6 |
| 2 | 27.1 | 24.7 | 17.6 | 24.2 |
| 3 | 24.6 | 23.2 | 18.7 | 18.8 |
| 4 | 22.2 | 30.2 | 20.7 | 16.8 |
| 5 | 25.1 | 31.9 | 15.2 | |
| 6 | 29.8 | 24.1 | ||
| 7 | 24.9 |