Researchers conduct a study to test a potential side effect of a new allergy medication

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Researchers conduct a study to test a potential side effect of a new allergy medication. A random sample of 160 subjects with allergies was selected for the study. The new "improved" Brand I medication was randomly assigned to 80 subjects, and the current Brand C medication was randomly assigned to the other 80 subjects. 14 of the 80 patients with Brand I reported drowsiness, and 22 of the 80 patients with Brand C reported drowsiness.

2) Compute a 95% confidence interval for the difference in proportions of subjects reporting drowsiness. Show all steps.