Question: Refer to Exercise 13.5. a. Suppose that the relationship between E(y) and x is a straight line. What would you know about the value of

Refer to Exercise 13.5.
a. Suppose that the relationship between E(y) and x is a straight line. What would you know about the value of b2?
b. Do the data provide sufficient evidence to indicate curvature in the relationship between y and x?

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