Refer to Exercise 12.13. Fit a cubic model to the data, and then answer the following questions.
a. Can the hypothesis of no overall predictive value be rejected at the a 5 0.01 level? Justify your answer.
b. Test the research hypothesis H0: b3 = 0 at the α = 0.05 level. Report the p- value of the test.
c. Based on the results of the test in part (b), display the estimated regression model.
d. Plot the data along with the best- fitting estimated regression line.
In exercise

Transcribed Image Text:

Additive Feed Efficiency Ratio (gm Feed to gm WtGain) 0 20 40 60 80 100 1.30,1.35, 144, 152, 1.56, 161, 148, 156, 145, 1.14 217 2.11.2.08,2.13, 222,2.29,2.33, 2.24, 2.16,221 2.30,2.34,2.20,2.38, 2.48,2.44, 2.37 2.43,2.32 2.41 247 2.51.2.79,240.2.55,267 250,2.55,2.60,2.49 3.31,3.17 3.24, 321,3.35,3.38, 342,3.36,3.25,351 4.92.3.87 4.81,488, 5.06,5.09.497 4.95, 4.59,4.76