Question

Please give some detailed explanations on each of the sub-questions. Thanks!

2.8 Deviations from the mean Sometimes it is convenient to write the simple linear regression model in a different form that is a little easier to manip- ulate. Taking Equation (2.1), and adding ßix -P,T, which equals 0, to the right-hand side, and combining terms, we can write (2.24) where we have defined α-A+A. This is called the deviations from the sample mean form for simple regression. 2.8.1 What is the meaning of the parameter o? 2.8.2 Show that the least squares estimates are â-y, P, as given by (2.5) 2.8.3 Find expressions for the variances of the estimates and the covari- ance between them

Answer 1