=+30. Home prices, part 2. Here are some diagnostic plots for the home prices data from Exercise

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=+30. Home prices, part 2. Here are some diagnostic plots for the home prices data from Exercise 29. These were generated by a computer package and may look different from the plots generated by the packages you use. (In particular, note that the axes of the Normal probability plot are swapped relative to the plots we’ve made in the text. We only care about the pattern of this plot, so it shouldn’t affect your interpretation.) Examine these plots and discuss whether the assumptions and conditions for the multiple regression seem reasonable.

100000 200000 300000 400000 Fitted Value 150000

–100000

–50000 50000 100000 Residual ($)

0 M17_SHAR8696_03_SE_C17.indd 617 14/07/14 7:38 AM 618 CHAPTER 17 Multiple Regression

–100000 –50000 0 50000 100000 150000 Residual ($)

2

–2

–1 0

1 Normal Score Normal Probability Plot 2

3 4

5 1

0 Frequency

–50000 0 50000 100000 150000 Residual ($)

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Business Statistics Plus Pearson Mylab Statistics With Pearson Etext

ISBN: 978-1292243726

3rd Edition

Authors: Norean R Sharpe ,Richard D De Veaux ,Paul Velleman

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