Processing math: 100%
 
+0  
 
0
712
1
avatar+845 

the number of points issac scores for collecting treasures is Y

Y=100X-50

Calculate the mean and the standard deviation of Y

 Oct 29, 2018
 #1
avatar+6252 
+1

E[aX+b]=aE[X]+bVar[aX+b]=a2Var[X]E[Y]=E[100X50]=100E[X]50Var[Y]=Var[100X50]=10000Var[X]

 

I bet you have E[X] and Var[X] from some other part of the problem so plug those in.

 Oct 30, 2018

0 Online Users