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8.41 Evaluating a new drug. Merck Research Labs conducted 0 an experiment to evaluate the effect of a new drug using now the single-T swim
8.41 Evaluating a new drug. Merck Research Labs conducted 0 an experiment to evaluate the effect of a new drug using now the single-T swim maze. Nineteen impregnated dam rats were captured and allocated a dosage of 12.5 milligrams of the drug. One male and one female rat pup were randomly selected from each resulting litter to perform in the swim maze. Each pup was placed in the water at one end of the maze and allowed to swim until it escaped at the opposite end. If the pup failed to escape after a certain period of time. it was placed at the beginning of the maze and given another chance. The experiment was repeated until each pup accomplished three successful escapes. The table be- low reports the number of swims required by each pup to perform three successful escapes. Is there sufficient evi- dence of a difference between the mean number of swims required by male and female pups? Conduct the test (at a = .10). Comment on the assumptions required for the test to be valid. Utter Male Female Utter Male Female 1 8 5 ll 6 5 2 8 4 12 6 3 3 6 7 13 12 5 4 6 3 14 3 8 5 6 S 15 3 4 6 6 3 16 8 12 7 3 8 l7 3 6 8 5 10 18 6 4 9' 4 4 l9 9 5 10 4 4
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