作者phsealion (干麽重填?)
看板PH-94
标题下次要交的医统作业
时间Mon Jun 4 23:29:23 2007
1.今天lab的习题 (没来lab可以上ceiba看题目)
2.老师讲义p.36 Homework
Use the anderson.txt data to the best model of the following 4 Cox PH models.
– Model 1 includes Rx, Sex, log WBC, Rx x Sex, and Rx x logWBC
– Model 2 includes Rx, Sex, log WBC, Rx x Sex
– Model 3 includes Rx, Sex, Rx x Sex
– Model 4 includes Rx, Sex, log WBC
‧ Questions:
1. Evaluate whether you would prefer model 1 or model 2.
2. Evaluate whether you would prefer model 3 or model 2.
3. Which of the 4 models you think is best? Explain.
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