Question: Please answer (5) (15 pts) Please use Final Problem 5 Dataset.txt (a) Fit a simple linear regression for Y (Revenue Estimate) vs X (Expenses). Comment

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Please answer (5) (15 pts) Please use Final

(5) (15 pts) Please use Final Problem 5 Dataset.txt (a) Fit a simple linear regression for Y (Revenue Estimate) vs X (Expenses). Comment on the homoscedasticity assumption. (b) Do you have reason to conclude that the constant-variance assumption is not reasonable? If so, suggest a weighted least squares approach to address this issue. (c) Does your weighted residual plot show any improvement? Use the nearest neighbor approach as well the "residual fit" method discussed in class. 13 B 1 Revenue Expense 2 81464 3000 3 72661 3150 4 72344 3085 5 90743 5225 6 98588 5350 7 96507 6090 8 126574 8925 9 114133 9015 10 115814 8885 11 123181 8950 12 131434 9000 140564 11345 14 151352 12275 15 146926 12400 16 130963 12525 17 146630 12310 18 147041 13700 179021 15000 20 166200 15175 21 180732 14995 22 178187 15050 185304 15200 24 155931 15150 25 172579 16800 26 188851 16500 192424 17830 28 203112 19500 192482 19200 30 218715 19000 31 214317 19350 19 23 27 29

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