Question 11.13

For Exercises 11.1 and 11.2, see page 533; for 11.3 and 11.4, see page 535; for 11.5 and 11.6, see page 537; for 11.7 and 11.8, see page 538; for 11.9 and 11.10, see page 541; for 11.11 to 11.14, see pages 543–544; and for 11.15 and 11.16, see page 544.

Question 11.13

11.13 Residuals for the log analysis.

In Exercise 11.10, you carried out multiple regression using the logarithms of all the variables in Table 11.2. Obtain the residuals from this regression and examine them as you did in Exercise 11.11. Summarize your conclusions and compare your plots with the plots for the original variables.

11.13

The residual plots are much better for the log transformed data; there is no longer any curvature in the plots. The Normal quantile plot shows the data are much better and roughly Normally distributed.

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