Concept explainers
a.
Test for the statistical significance of the regression with no interaction at level of significance
Find the P-value for the test.
b.
Construct the t-test statistic for each of the regressors in the model with no interaction and draw necessary conclusions about the contributions of the regressors at level of significance
c.
Find how useful the regressor
d.
Reconstruct the model by including the interaction term.
Test for the statistical significance of the regression with interaction term, at level of significance
e.
Find how useful the regressor
f.
Obtain the estimate of
Compare this value with the estimated
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Applied Statistics and Probability for Engineers
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