Homework Answers
From the given data ,
Here,
| Group | ni | x̅i | S2i | ni*(Xi-Xgrand)2 | (ni-1)*S2i |
| A | 5 | 7.4 | 2.800 | 1.800 | 11.20 |
| B | 5 | 4.4 | 1.300 | 28.800 | 5.20 |
| C | 5 | 8.6 | 2.800 | 16.200 | 11.20 |
| grand mean= | 6.80 | 46.800 | 27.60 | ||
| SSTr | SSE | ||||
| Source | SS | df | MS | F | |
| between | 46.80 | 2.000 | 23.4000 | 10.174 | |
| within | 27.60 | 12.000 | 2.3000 | ||
| total | 74.40 | 14.0000 |
F ratio =10.2
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