Sinusitis and antibiotics. Researchers studying the effect of antibiotic treatme

Question

Sinusitis and antibiotics. Researchers studying the effect of antibiotic treatment compared to symptomatic treatment for acute sinusitis randomly assigned 166 adults diagnosed with sinusitis into two groups. Participants in the antibiotic group received a 10-day course of an antibiotic, and the rest received symptomatic treatments as a placebo. These pills had the same taste and packaging as the antibiotic. At the end of the 10-day period patients were asked if they experienced improvement in symptoms since the beginning of the study. The distribution of responses is summarized below. Self-reported ent in symptoms Total ic Treatment Antibiot Placebo 65 131 16 81 Name STT 200-Homework 5 PAGE 3 of 6 6. (1) What type of a study is this? a. Experiment b. Observational study 7. [1] Does this study make use of blinding? a. b. Yes, because half of the participants received a placebo. No, because the researchers decided who received the antibiotic and who received the

Explanation / Answer

(6) Here the study is experimental study.

(7) Yes, the process invloved blinding.

(8) Here p^antibiotic = 66/85 = 0.7765

p^biotic = 65/81 = 0.8025

Here biotic seems more effective.

(9) Here the value we get is 666, which is not unusual as per the given histogram. So, the null hypothesis should not be rejected.

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