Question

What test can be used to compare the prevalence of otorrhea for the ear group vs the observation group given? State the hypotheses to be tested.

A clinical trial was conducted and children were seen at home by study physicians at 2 weeks and 6 months after randomization. The primary outcome was the presence of otorrhea at 2 weeks observed by study physicians. The results are given in following table:

Group	Number of Children	w/otorrhea at 2 weeks
Antibiotic ear drops	76	4
Oral antibiotics	77	34
Observation	75	41

I think this could be done with a chi-square test, because samples are independent, is this correct?

Answer 1

P.S. (please upvote if you find the answer satisfactory)