Refer to exercise 5. a. Use α = .01 to test the hypotheses b. Use α = .05 to test the significance of 1. Should x1 be dropped from the model? c. Use α =.05 to test the significance of 2. Should x2 be...

Refer to exercise 5.

a. Use α = .01 to test the hypotheses

b. Use α = .05 to test the significance of 1. Should x1 be dropped from the model?

c. Use α =.05 to test the significance of 2. Should x2 be dropped from the model?