Question: (9 marks). A study discussed the relationship between cigarette smoking and the mortality index for mouth cancer in men. The subjects were residents of 16 regions of Great Britain, Norway, and Sweden. The objective of the study was to determine whether a linear relationship between the variables was appropriate. The data are given in the file data2_Q6.sav.

a. Construct a scatter plot of mouth cancer mortality index against cigarette smoking amount. (3 marks)

b. Fit a regression line with the smoking amount as the independent variable and mortality index as the dependent variable. (3 marks)

c. Add the regression line to your plot and interpret your results. (3 marks)