Given the following probability distributions for variables Xand Y:
P(x,y)XÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Y
0.4Â Â Â Â Â Â Â 100Â Â Â Â Â Â Â Â Â Â Â Â 200
0.6Â Â Â Â Â Â Â 200Â Â Â Â Â Â Â Â Â Â Â Â 100
a. E(X) and E(Y).
b. σX and σY.
c. σXY. d. E(X + Y).
e. Suppose that X represents the number of patients successfullytreated for Malaria and Y represents the number of patientssuccessfully treated for Tuberculosis. And medication A (first rowin the table) has a 40% of effectiveness and medication B (secondrow in the table) has a 60% of effectiveness. Interpret and makestatements based on the calculations you did.
