Question: 13. In exercise 3, the following estimated regression equation based on 30 observations was presented. y 5 17.6 1 3.8x1 2 2.3x2 1 7.6x3 1

13. In exercise 3, the following estimated regression equation based on 30 observations was presented.

yˆ 5 17.6 1 3.8x1 2 2.3x2 1 7.6x3 1 2.7x4 The values of SST and SSR are 1805 and 1760, respectively.

a. Compute R2.

b. Compute R2a

.

c. Comment on the goodness of fit.

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