|Consider the data set for Exercise 7.58, page 341 (hospital data), repeated here. (a) The SAS PROC REG outputs provided in Figures 7.26 and 7.27 on pages 353 and 354 supply a considerable amount of information. Goals are to do outlier detection and eventually determine which model terms are to be used in the final model. (b) Often the role of a single regression variable is not apparent when it is studied in the presence of several other variables. This is due to multicollinearity. With this in mind, comment on the importance of x and x in the full model as opposed to their importance in a model in which they are the only variables. (c) Comment on what other analyses should be run. (d) Run appropriate analyses and write your conclusions concerning the final model.|
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