[Solution] Sixteen guinea pigs have been randomly assigned to four groups. Within each group, each guinea pig is given 10 trials with a particular type
Question: Sixteen guinea pigs have been randomly assigned to four groups. Within each group, each guinea pig is given 10 trials with a particular type of food. The response measure is the number of pieces eaten by each subject. The scores are shown here.
| Lettuce Pieces | Carrot Pieces | Alfalfa Pieces | Strawberry Pieces |
| 10 | 8 | 5 | 1 |
| 9 | 8 | 5 | 1 |
| 9 | 9 | 4 | 2 |
| 10 | 7 | 6 | 1 |
Perform an overall test of significance. If the test is significant, make all pairwise comparisons.
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