Question

Researchers want to test the effectiveness of a new pain medication. Four hundred people were recruited to participate in the clinical trial. In clinical testing, 40 out of 201 people taking the medication reported pain symptoms. Of the other 199 people receiving a placebo, 20 reported pain symptoms. Combining the two samples together, what is the overall proportion of those who reported pain symptoms among all participants?

0.15

0.47

0.19

0.34

Answer 1

solution:- Ginen: - No. of favourable case - sample sime - x = 40 l x 2 = 20 n = 2011 1₂ = 199 sample Proportion (p?) = x1 = 40 = 0.1990 201 imple Proportion (12) - X2 = 20 = 0.1005 X2 0.1005 20 199 n * overall proportion is, È = x + x2 ni+h₂ = 40 + 20 a 201 + 199 I P = 0.15