Question: Consider the absorption index data in Exercise 12-2. The total sum of squares for y is SST 742.00. (a) Test for significance of regression using

Consider the absorption index data in Exercise 12-2.

The total sum of squares for y is SST 742.00.

(a) Test for significance of regression using 0.01. What is the P-value for this test?

(b) Test the hypothesis H0: 1 0 versus H1: 1  0 using 0.01. What is the P-value for this test?

(c) What conclusion can you draw about the usefulness of x1 as a regressor in this model?

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