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E(R)=24/11 

Var(R)=95/121

these are the mean and variance of a four sided spinner that is represented by the discrete random variable R

 

find the new mean and Variance when the numbers in the spinner are trebled and then subtracted from 1

 Oct 30, 2018
 #1
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E[aX+b]=aE[X]+bV[aX+b]=a2V[X]

 

˜R=13RE[˜R]=E[13R]=13E[R]=13(2411)=17211=6111

 

V[˜R]=V[13R]=(3)2V[R]=9(95121)=85511

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 Oct 30, 2018

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