Problem Statement and Interaction Area ViagraTreatment Placebo Headache 111 27 N
ID: 3359414 • Letter: P
Question
Problem Statement and Interaction Area
ViagraTreatment
Placebo
Headache
111
27
No Headache
609
708
Use the data in the accompanying table (based on data from Pfizer, Inc., as presented in Triola & Triola). The table describes results from a clinical trial of the well-known drug Viagra. Calculate the probability that a patient receiving the placebo will have a headache.
ViagraTreatment
Placebo
Headache
111
27
No Headache
609
708
Explanation / Answer
Number of people who have receivedd placebo and had an headache = 27
Number of people who have receivedd placebo = 27+708 = 725
Probability that a patient receiving the placebo will have headache = Number of people who have received placebo and had an headache / Number of people who have received placebo = 27/725 = 0.037241
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