For the data set: Hospital Complete of Chapter 5

Work out the details of the Stepwiseregression, 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 algorithmsyourselves. 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.

Xray	BedDays	Length	Load	Pop	Hours
2463	472.92	4.45	15.57	18.0	566.52
2048	1339.75	6.92	44.02	9.5	696.82
3940	620.25	4.28	20.42	12.8	1033.15
6505	568.33	3.90	18.74	36.7	1603.62
5723	1497.60	5.50	49.20	35.7	1611.37
11520	1365.83	4.60	44.92	24.0	1613.27
5779	1687.00	5.62	55.48	43.3	1854.17
5969	1639.92	5.15	59.28	46.7	2160.55
8461	2872.33	6.18	94.39	78.7	2305.58
20106	3655.08	6.15	128.02	180.5	3503.93
13313	2912.00	5.88	96.00	60.9	3571.89
10771	3921.00	4.88	131.42	103.7	3741.40
15543	3865.67	5.50	127.21	126.8	4026.52
36194	7684.10	7.00	252.90	157.7	10343.81
34703	12446.33	10.78	409.20	169.4	11732.17
39204	14098.40	7.05	463.70	331.4	15414.94
86533	15524.00	6.35	510.22	371.6	18854.45