(a) Explain what is meant by the term regression.
(b) Describe the justification for the inclusion of a disturbance term in a regression analysis.
(c) With appropriate examples, discuss the different types of data that are available for empirical analysis.
(d) Show that Cov(a+bX,c+dY)= bdCov(X,Y) where a, b, c, and d are constants.