A pilot study is proposed to evaluate whether a new medication is effective in c

Question

A pilot study is proposed to evaluate whether a new medication is effective in controlling the symptoms of asthma. A sample of 10 patients with asthma is enrolled in the pilot study. Each patient agrees to take the study medications and to report back to the study evaluation team in 30 days for a clinical evaluation. Similar studies report that 90% of all patients complete follow-up visits 1month from the initial contact.

What is the expected number of patients (out of 125) who DO NOT show up (if the true show rate is 87%)?

Explanation / Answer

Expectted numebr of patients who do not show up = n*(1-p) = 125*(1-0.87)=16.25

Approximatley 16.25 persons are not expected to show up

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