10. Treatment versus Control An experiment was conducted to test the effect of a new drug on...

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10. Treatment versus Control An experiment was conducted to test the effect of a new drug on a viral infection.

After the infection was induced in 100 mice, the mice were randomly split into two groups of 50. The control group received no treatment for the infection, while the other group received the drug. After a 30-day period, the proportions of survivors, ˆ1 p and ˆ2 p , in the two groups were found to be .36 and .60, respectively.

a. Is there sufficient evidence to indicate that the drug is effective in treating the viral infection? Use a 5.05.

b. Use a 95% confidence interval to estimate the actual difference in the survival rates for the treated versus the control groups.

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