SOLUTION: In the tests of a new pharmaceutical product, data were collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were

Algebra ->  Probability-and-statistics -> SOLUTION: In the tests of a new pharmaceutical product, data were collected for use in the approval process required by the U.S. Food and Drug Administration (FDA). Some participants were      Log On


   



Question 416737: In the tests of a new pharmaceutical product, data were
collected for use in the approval process required by the
U.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:
Drug: No Help 22 Help 47
Placebo: No Help 31 Help 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?
I'm having a huge issue with this. Could you please show your work, or just explain how it's done so I can learn the method as well as understand what the answers are? Thanks so much!!!!

Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
No Help Help Total
Drug: 22 47 69
Placebo: 31 20 51
Total 53 67 120
What is the probability that:
a) the participants perceived that their “medication”
helped if they received the drug? 47/69
b) the participants perceived that their “medication”
helped if they received the placebo? 20/51
c) the participants perceived that their “medication”
helped? 67/120