Hey Guys,
Another probability problem. I am not able to figure out the right values to use for favorable outcomes.
In a medical experiment, some students who suffered from stress were given the drug "StressOff" while others were given "Placebo". The proportions in different categories are given below.
- Find the value of p.
- Find the probability that a student chosen at random
- Took the drug "StressOff" but did not improve,
- did not improve at all
- improved given that he or she took the drug "Placebo"
(I)
These are percentages so,
(II-a)
This is wrong, the required answer is 0.32. When calculating probability of not improve, are the favorable outcomes out of only people part of the StressOff group?
(II-b)
This is the only thing I have got right in this problem!
(II-c)
Again incorrect, the required answer is 0.15
Any inputs to help me figure out what I did wrong here would be greatly appreciated. Thanks.
Thanks @CaptainBlack. I guess I was over thinking this one.
II.c (0.14)/(0.42) = 0.33. The required answer was 0.15. I am thinking like II.a isn't this also a direct value from Placebo and Improved, ie:- 0.14. Can you please clarify a little why II.c should be interpreted differently than II.a?
Thanks.