SOLUTION: A vaccine to prevent a severe virus was given to children within the first year of life as part of a drug study. The study reported that of the 3395 children randomly assigned the&

Question 1100721: A vaccine to prevent a severe virus was given to children within the first year of life as part of a drug study. The study reported that of the 3395 children randomly assigned the vaccine, 61 got the virus. Of the 1608 children randomly assigned the placebo, 41 got the virus.
a. Find the sample percentage of children who caught the virus in each group. Is the sample percentage lower for the vaccine group, as investigators hoped?
b. Determine whether the vaccine is effective in reducing the chance of catching the virus, using a significance level of 0.01 The first few steps of the hypothesis-testing procedure are given. Complete the procedure.
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
61/3395=0.01796759941
41/1608=0.02549751243
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