c. Find the correlation coefficient and the coefficient of determination.( points) # Your code here d. Predict the mileage for a midsize automobile traveling at 35 mph. (7 points) # Your code here ## Problem 4: Sales and visits Dorothy Kelly sells life insurance for the Prudence Insurance Company. She sells insurance by making visits to her clients' homes. Dorothy believes that the number of sales should depend, to some degree, on the number of visits made. For the past several years, she has kept careful records of the number of visits (X) she made each week and the number of people (Y) who bought insurance that week. For a random sample of 15 such weeks, the X and Y values follow: Variable - - |- - - -I - - - - I - - - -l - 1 - - - - |---- | - --- | - - - - | - - - - | - - - - | - - --| - - - - | - - - - | - - - - |-- X (visits) 15 | 29 | 8 | 25 | | 11 | 19 | 16 | 13 | 28 | 5 | 20 | 14 | 22 | 7 16 Y (sales) 3 | 11 | 8 | 5 | 8| 2 | 5 | 6 | 8 | 3 5 | 10 | 61 10| 7 a. Find the equation of the least squares line and provide a model summary. ( points) "fr} # Your code here b. Create a new plot labeling the axes and insert the regression line in the scatter diagram of part (a) . (6 points) "fr} # Your code here c. Find the correlation coefficient and the coefficient of determination. (5 points) # Your code here d. Predict the number of sales if Dorothy visits 10 times. (7 points) # Your code here e. Is the prediction you made in the previous part an extrapolation or lation? (2 points)