The covariance of X and Y, if Y is related to X by Y = ax...

  

Transcribed Image Text:

The covariance of X and Y, if Y is related to X by Y = ax + b is given as a. VAR(X) .a O a. E[X]. VAR(x) .b O a. E[X]. E(X). VAR(X) .c O a. a. E[X] .VAR(X) .d O :Let A and Ba random variables wit the following information E[A]=3, E[A?]=13 E[B]=4, E[B?]= 25 the correlation coefficient p = 1/2 : the variance of B equals to إختر أحد الخيارات 13 .a O none of these.b O 4.c O 9.d O The covariance of X and Y, if Y is related to X by Y = ax + b is given as a. VAR(X) .a O a. E[X]. VAR(x) .b O a. E[X]. E(X). VAR(X) .c O a. a. E[X] .VAR(X) .d O :Let A and Ba random variables wit the following information E[A]=3, E[A?]=13 E[B]=4, E[B?]= 25 the correlation coefficient p = 1/2 : the variance of B equals to إختر أحد الخيارات 13 .a O none of these.b O 4.c O 9.d O