Chapter 7.5, Problem 2ED

(A)

To determine

To predict: The technique among linear regression or quadratic regression, yields the smaller sum of the residuals for the data of given Table 1, using the graphs in Figure 4 and Figure 5.

The quadratic regression yields the smaller sum of the residuals for the data of given Table 1.

(B)

To determine

To confirm: The prediction in part (A) by computing the sum of squares of the residuals in each case.

The quadratic regression yields the smaller sum of the residuals for the data of given Table 1.