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You will find the questions attached 5.1 For the survival times given in Table 3.1, compare the survival distributions of the two treatment

September 17, 2024

You will find the questions attached

5.1 For the survival times given in Table 3.1, compare the survival distributions of

the two treatment groups using:

(a) Gehan’s generalized Wilcoxon test

(b) The Cox-Mantel test

5.2 For the remission data given in Table 3.1, compare the remission time

distributions of the two treatment groups using

(a) The logrank test

(b) The Peto and Peto’s generalized Wilcoxon test

Exercise 4.5 the following remission times of 42 patients with acute leukemia reported by
Freireich et al. (1963)* in a clinical trial to assess the efficacy of 6-mercaptopurine (6-MP)
to maintain remission. The patients were randomized to receive 6-MP or a placebo. The
study was terminated after 1 year and the following remission times, in weeks, were
recorded: 6- MP(21 patients) : 6, 6, 6, 7, 10, 13, 16, 22, 23, 6+, 94, 10+, 11+, 17+, 19+, 20+,
25+, 32+, 32+, 34+, 35+ Placebo (21 patients) : 1, 1, 2, 2, 3, 4, 4, 5, 5, 8, 8, 8, 8, 11, 11, 12,
12, 15, 17, 22, 23

5.5 Consider the remission time in Exercise 4.5. Use the logrank test and the generalized
Wilcoxon test to test the equality of the two treatments.

5.6 For the first four skin tests given in Exercise Table 3.1, use the Cox-Mantel test and the
logrank test to see if there is a significant difference in survival between patients with
positive (25×5 mm for mumps, ≥10 x 10 mm for others) and negative (<5×5 mm for mumps,
<10 x 10 mm for others) reactions.

5.7 Using the data in Table 3.1, compare the age distributions of the two treatment groups
using Cox’s F-test.

>Mathematics homework help

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You will find the questions attached 5.1 For the survival times given in Table 3.1, compare the survival distributions of the two treatment

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