Consider the regression model fit to the soil shear strength data in Exercise 12-1. (a) Test for significance of regression using a = 0.05. What is the P-value for this test? (b) Construct the t-test...

Consider the regression model fit to the soil shear strength data in Exercise 12-1.
(a) Test for significance of regression using a = 0.05. What is the P-value for this test?
(b) Construct the t-test on each regression coefficient. What are your conclusions, using a = 0.05?