Question: 20. Refer to the data presented in exercise 2. The estimated regression equation for these data is y 5 218.37 1 2.01x1 1 4.74x2 Here

20. Refer to the data presented in exercise 2. The estimated regression equation for these data is yˆ 5 218.37 1 2.01x1 1 4.74x2 Here SST = 15,182.9, SSR = 14,052.2, sb1

= .2471, and sb2

= .9484.

a. Test for a significant relationship among x1, x2, and y. Use a = .05.

b. Is b1 significant? Use a = .05.

c. Is b2 significant? Use a = .05.

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