In a study undertaken to compare the treatments given to hypernephroma patients and to relate response and survival to surgery, metastasis, and treatment time, data from 58 patients were collected (Exercise Table 3.2). How would you analyze the data to answer these questions?
(a) Do patients who had nephrectomy have a higher response rate?
(b) Is the time of nephrectomy related to response and survival?
(c) Are there significant differences between the treatments?
(d) What are the most important variables related to response and survival?
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