Question: Refer to Exercise 12.12. Fit a second- order regression model to the data. a. Was there an improvement in the fit of the model compared

Refer to Exercise 12.12. Fit a second- order regression model to the data.
a. Was there an improvement in the fit of the model compared to the first- order model?
b. Test the hypothesis that distance to the hub airport is a significant predictor of revenue at the Î± = .05 level.
c. Test the hypothesis that population size is a significant predictor of revenue at the Î± = .05 level.
In exercise

ula 96 96 73 55 91 64 60 60 220 70 75 005 014 193 250 250 220 170 170 250 140 22 17 724 67 38 43 33 24 $50 140 200 22 3 2 2 2 2 2 mpo 2 3 4 5. 8901 ala-56 74 67 78 73 54 00 98 kun 33 200 006 -39625534054 22221221112 125140 tes 24 368665330 rp- 1 2 3 4 5 6 7 8 9 0 1

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