For the data set: Hospital Complete of Chapter 5 Work out the details of the Stepwise...

 

  

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For the data set: Hospital Complete of Chapter 5 Work out the details of the Stepwise regression, and Backward model selection for the data set Hospital Complete from chapter 5. I would like you to not use SAS option "stepwise" or "backward" in the code, but rather go through the steps of the algorithms yourselves, in other words, run as many regression models as needed. Indicate the variables you include in/exclude from the model, on what basis, and the final model you have arrived at. A1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A X C Length 4.45 6.92 fx D B Xray BedDays 2463 472.92 2048 1339.75 3940 620.25 6505 568.33 5723 1497.60 11520 1365.83 4.60 44.92 5779 1687.00 5.62 55.48 5969 1639.92 5.15 59.28 8461 2872.33 6.18 94.39 20106 3655.08 6.15 128.02 13313 2912.00 5.88 96.00 10771 3921.00 4.88 131.42 15543 3865.67 5.50 127.21 36194 7684.10 7.00 252.90 34703 12446.33 10.78 409.20 7.05 463.70 6.35 510.22 39204 14098.40 86533 15524.00 Xray Load 15.57 44.02 4.28 20.42 3.90 18.74 5.50 49.20 E Pop 18.0 9.5 12.8 36.7 35.7 1033.15 1603.62 1611.37 1613.27 1854.17 2160.55 2305.58 3503.93 60.9 3571.89 103.7 3741.40 126.8 4026.52 24.0 43.3 F Hours 566.52 696.82 46.7 78.7 180.5 157.7 10343.81 169.4 11732.17 331.4 15414.94 371.6 18854.45 G For the data set: Hospital Complete of Chapter 5 Work out the details of the Stepwise regression, and Backward model selection for the data set Hospital Complete from chapter 5. I would like you to not use SAS option "stepwise" or "backward" in the code, but rather go through the steps of the algorithms yourselves, in other words, run as many regression models as needed. Indicate the variables you include in/exclude from the model, on what basis, and the final model you have arrived at. A1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 A X C Length 4.45 6.92 fx D B Xray BedDays 2463 472.92 2048 1339.75 3940 620.25 6505 568.33 5723 1497.60 11520 1365.83 4.60 44.92 5779 1687.00 5.62 55.48 5969 1639.92 5.15 59.28 8461 2872.33 6.18 94.39 20106 3655.08 6.15 128.02 13313 2912.00 5.88 96.00 10771 3921.00 4.88 131.42 15543 3865.67 5.50 127.21 36194 7684.10 7.00 252.90 34703 12446.33 10.78 409.20 7.05 463.70 6.35 510.22 39204 14098.40 86533 15524.00 Xray Load 15.57 44.02 4.28 20.42 3.90 18.74 5.50 49.20 E Pop 18.0 9.5 12.8 36.7 35.7 1033.15 1603.62 1611.37 1613.27 1854.17 2160.55 2305.58 3503.93 60.9 3571.89 103.7 3741.40 126.8 4026.52 24.0 43.3 F Hours 566.52 696.82 46.7 78.7 180.5 157.7 10343.81 169.4 11732.17 331.4 15414.94 371.6 18854.45 G

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Alternative R code The following R code should produce ... View the full answer