Question
Given independent random variables X and Y with E ( X )=80, X=10 and E (Y)=85, Y =12 respectively, find the mean and variance of
Given independent random variables X and Y with E ( X )=80, X=10 and
E (Y)=85, Y =12 respectively, find the mean and variance of each of the following random variables.
a. W=4X-2Y
b. {X1 ,..., X 100} and {Y1, ...,Y 100} are independent draws from X and Y distributions.
W=y bar -x
c. {X1,..., X10} are independent draws from X distributions. W =X1+,...,+X10
d. W=10X
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Essentials of Business Analytics
Authors: Jeffrey D. Camm, James J. Cochran, Michael J. Fry, Jeffrey W. Ohlmann, David R. Anderson
2nd edition
1305627733, 978-1305861817, 1305861817, 978-0357688960, 978-1305627734
