Question

a. Using the pairs of values for all 10 points, find the equaton of the regression ine b. After removing the point with coordinates (1.3), use the pairs of values for the remaining 9 points and find the equation of the regression line c Compare the results rom parts (a) and (b) a. What is the equation of the regression line for all 10 points? (Round to three decimal places as needed) b, what is the equationofthe regression line tor the set of 9 ports? (Round to throe decimal places as needed) c. Choose the comect description of the resuits below ○ A. The regression sne changes, but the change is small. O B. The removal of the point has a significant impact on the regression line OC. There is no regression line for the second case because the data are in a pattem O D. The regression line is very simlar in both cases

Answer 1

a)

(x-x) (y-y) 0.4200 0.1800 0.7800 -0.2800 0.1200 0.5200 0.9800 0.4200 1.8200 9.7200 10.8000 (x-x) 0.4900 0.0900 1.6900 0.4900 0.0900 1.6900 0.4900 0.0900 1.6900 7.2900 14.1000 (y-y) 0.3600 0.3600 0.3600 0.1600 0.1600 0.1600 1.9600 1.9600 1.9600 12.9600 20.4000 S.No 1 2 4 4. 10 1 37 3.7000 Total SSY Mean 6.6000 SSX sample size: here 10 6.6000 3.7000 from above 14.1000 10.8000 slope- 0.76596 intercept- 3.76596 hence line equation 3.766 0.766 x

b)

Yhat=7

c)

option B is correct