Consider the following sample data:

52 49 45 54 45 52 40 34 11 10 9 13 9 13 6 7 25 39 25 24 31 22 28 21

a. Estimate a multiple linear regression model and interpret the coefficient for x2.

b. Find the predicted value for y if x1 equals 12 and x2 equals 30.

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