In randomized, double blind clinical trials of a new vaccine, infants were rando

Question

In randomized, double blind clinical trials of a new vaccine, infants were randomly divided into two groups Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine After the second dose. 132 of 444 subjects in the experimental group (group 1) experienced drowsiness as a side effect After the second dose. 36 of 100 of the subjects in the control group (group 2) experienced drowsiness as a side effect Does the evidence suggest that a different proportion of subjects in group 1 experienced drowsiness as a side effect than subjects in group 2 at the alpha = 0 10 level of significance?. Determine the null and alternative hypotheses Choose the correct answer below H_0:P_1 = P_2 versus H_1:P_1 P_2 H_0:P_1 = P_2 versus H_1:P_1 P_2 H_0:P-1 = 0 versus H_0:P_1 0 The test statistic z_0 is

Explanation / Answer

H0: p1 = p2

Ha: p1 not equals p2

Two tailed test

(Option c)

The proportion of responses for Observation 1(p1) is 0.297. The proportion for Observation 2(p2) is 0.36.

p1-p2 = -0.063

std error = 0.0514

Z score = -1.2261

z = -1.226

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