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Help 14,15

 
NotSoSmart  Apr 16, 2018
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3+0 Answers

 #1
avatar+85726 
+1

14....Mutually exclusive.....means that two things cannot happen simultaneously....so....you can't roll a 3 and a 4  at the same time...

 

 

cool cool cool

 
CPhill  Apr 16, 2018
 #2
avatar+6943 
+1

P(placebo and improvement)  =  \(\frac{\text{number who received placebo and reported improvement}}{\text{total number who participated in the study}}\)

 

Let the total number of people who participated in the study  =  t

 

80% of those who participated in the study received med A .  So…
20% of those who participated in the study received a placebo.

 

number of those who received the placebo   =   0.2t

 

62% of those who received the placebo reported no improvement.  So…
38% of those who received the placebo reported improvement.

 

number who received placebo and reported improvement  =  0.38( 0.2t )

 

P(placebo and improvement)  =  \(\frac{0.38(0.2t)}{t}\)   =   0.38(0.2)   =   0.076   =   7.6%

 
hectictar  Apr 17, 2018
 #3
avatar+85726 
+1

Thanks, hectictar.....!!!!

 

 

cool cool cool

 
CPhill  Apr 17, 2018

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