Homework Help: Math

Posted by Anonymous on Thursday, June 17, 2010 at 3:23am.

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:

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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?

Math - Anonymous, Thursday, June 17, 2010 at 3:42am
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%
Math - PsyDAG, Thursday, June 17, 2010 at 7:07pm
a. 47/69 (only of those who got the drug)

b. 20/51 (only of those who got the placebo)

c. Yes

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