Refer to Chapter 1, Exercise 2 and the data in Table 1.15. Build a simple linear regression for predicting the number of waterfowl knowing the amount of open water. Is there a relation? Check the...

Refer to Chapter 1, Exercise 2 and the data in Table 1.15. Build a simple linear regression for predicting the number of waterfowl knowing the amount of open water. Is there a relation? Check the assumptions of the model and, if necessary, try a suitable transformation of the dependent and independent variable.

Exercise 2

The data of Table 7.15 show the sugar content of a fruit (Sugar) for different numbers of days after picking (Days).

(a) Obtain the estimated regression line to predict sugar content based on the number of days after picking.

(b) Calculate and plot the residuals against days. Do the residuals suggest a fault in the model?