In the tests of a new pharmaceutical product, data were collected for use in the approval process required by theU.S. Food and Drug Administration (FDA). Some participants were given a placebo, an inert substance that looks like the drug; others were given the drug. The data are shown in the following table:

Question

In the tests of a new pharmaceutical product, data were collected for use in the approval process required by theU.S. Food and Drug Administration (FDA). Some participants  were given a placebo, an inert substance that looks like the drug; others were given the drug. The data are shown in the following table:

No Help     Help
Drug        22        47
Placebo     31        20

What is the probability that 
a. the participants perceived that their “medication" helped if they received the drug?

b. the participants perceived that their “medication” helped if they received the placebo?

c. the participants perceived that their “medication” helped?

Anonymous · Answer

Add up all of the participants in your study. 22+47+31+20= 120

Formula: Part/whole= percentage

(a) 47 perceived help from drug. 47/120= .3917= 39%
(b) 20/120= .166, round to 16.7%
(c) 47+20= 67/120= .5583= 55.8%

PsyDAG · Answer

a. 47/69 (only of those who got the drug) b. 20/51 (only of those who got the placebo) c. Yes