6.27. In a small-scale regression study, the following data were obtained: i: 2 3 4 5 6 Xn: X12: Y;: 7 4 16 3 21 8 41 33 33 7 49 5 31 42 75 28 91 55 Assume that regression model (6.1) with independent...

answer for d, e, and f

Extracted text: 6.27. In a small-scale regression study, the following data were obtained: i: 2 3 4 5 6 Xn: X12: Y;: 7 4 16 3 21 8 41 33 33 7 49 5 31 42 75 28 91 55 Assume that regression model (6.1) with independent normal error terms is appropriate. Using matrix methods, obtain (a) b; (b) e; (c) H; (d) SSR; (e) s² {b}; (f ) Ýn when Xp1 = 10, X42 = 30; (g) s²{Ýn} when Xµ1 = 10, Xp2 = 30.