Question: Refer to the papermaking data in Exercise 13.6. Obtain the residuals from the model you selected in Exercise 13.6. a. Is there evidence in the

Refer to the papermaking data in Exercise 13.6. Obtain the residuals from the model you selected in Exercise 13.6.
a. Is there evidence in the residuals of a violation of the normality condition?
b. Is there evidence in the residual plots of a violation of the constant variance condition?
c. Perform a BP test for constant variance. Does the test agree with your observations in part (a)?
d. Determine the appropriate Box€“ Cox transformation for these data.
In exercise

Run x 1 .2 .2 L5 145 83.9 2 4 15 45 84.9 3 245 145 83.419 31 2.5 160 852 4 4 35 145 84.2 5 2 35 145 83.8 23 3 25 160 84.7 6 4 35 45 84.7 7 235 145 84.0 8 415 175 848 2433 2.5 160 84.0 9 2 2 15 17s 84.5 10 4 215 175 86.0 11 2 415 175 826 12 4 435 175 85.1 13 2 3S 5 84.529 3 3 25 160 84.9 14 4 35 175 86.0 15 2 35 175 84.0 16 3.5 175 854 17 32.5 160 829 18 5 32.5 0 855 20 3 .5 2.5 160 845 22 3 3 2.5 160 85.0 23 3 2.5 160 849 25 3 3 25 160 845 26 3 2.5 160 84.7 27 3 32.5 160 84.6 28 3 3 2.5 6 84.9 30 3 3 2.5 160 84.5 31 3 3 2.5 160 84.6

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