For the Simple Regression Model of Chapter 4, You Have $\sum _ { i = 1 } ^ { 420 } Y _ { i }$

Essay

For the simple regression model of Chapter 4, you have been given the following data: $\sum _ { i = 1 } ^ { 420 } Y _ { i }$ = 274, 745.75; $\sum _ { i = 1 } ^ { 420 } X _ { i }$ = 8,248.979; $\sum _ { i = 1 } ^ { 420 } X _ { i } Y _ { i }$ = 5,392, 705; $\sum _ { i = 1 } ^ { 420 } X _ { i } ^ { 2 }$ = 163,513.03; $\sum _ { i = 1 } ^ { 420 } Y _ { i } ^ { 2 }$ = 179,878, 841.13
(a)Calculate the regression slope and the intercept.
(b)Calculate the regression R²