Answer Happy

Complete parts (a) through (h) for the data below. 60 Q 30 40 50 75 70 63 50 X 20 y 78 (a) By hand, draw a scatter diagram treating x as the explanatory variable and y as the response variable. Choose the correct scatter diagram below. O A. O B. O C. Ay 70-¹ 10+ 10 70 Q Q A) 100- to C 10 X 70 Q O G (b) Find the equation of the line containing the points (30,75) and (60,50). y=x+ (Type integers or simplified fractions.) (c) Graph the line found in part (b) on the scatter diagram. Choose the correct graph below. Ax 70- 10+ 0 y 100 Q Q

(c) Graph the line found in part (b) on the scatter diagram. Choose the correct graph below. O A. O B. 100- Ay to 10 70 Q 70-4 10+ 0 y (d) By hand, determine the least-squares regression line. y=x+ (Round to three decimal places as needed.) 100 O C. 70- Ay 10 10 lel Granh the loact.comaroc ronroccinn line on the cratter dianram Choose the correct aranh holow 70 Q O D. Ay 100+ H 0+ 10 X 70 A M

O A. 100+ o+ 10 X 70 Q O B. 70- Y 10+ 10 X 70 C. 100- 0+ 10 70 (f) Compute the sum of the squared residuals for the line found in part (b). -0.7 (Round to three decimal places as needed.) (g) Compute the sum of the squared residuals for the least-squares regression line found in part (d). (Round to three decimal places as needed.) (h) Comment on the fit of the line found in part (b) versus the least-squares regression line found in part (d). The line in part passes through the most points. The line in part L O D. 70+ 10+ 0 X 100 Q Q the sum of the squared residuals, thus being the best-fitting line.