Question 416737
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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