Show transcribed image text In a clinical study, 28 patients with cancer of the head and neck didn respond to chemotherapy. Their survival times in weeks are given below. 8.3 1.7 8.3 14.0 22.7 5.1 9.6 15.9 33.0 5.3 11.3 16.7 3.7+ 8.0+ 16.1+ 6.0 12.1 17.0 5.0+ 8.3+ 8.3 12.3 21.0 5.9+ 9.1+ 6.0+ 13.1+ 7.4+ 13.4+ (a) Make a hazard plot for each of the following distributions: exponen- tial, Weibull, lognormal, and log-logistic, (b) Which distribution provides a reasonable fit to the data? Estimate graphically the parameters of the distribution chosen
In a clinical study, 28 patients with cancer of the head and neck didn respond to chemotherapy. Their survival times in weeks are given below. 8.3 1.7 8.3 14.0 22.7 5.1 9.6 15.9 33.0 5.3 11.3 16.7 3.7+ 8.0+ 16.1+ 6.0 12.1 17.0 5.0+ 8.3+ 8.3 12.3 21.0 5.9+ 9.1+ 6.0+ 13.1+ 7.4+ 13.4+ (a) Make a hazard plot for each of the following distributions: exponen- tial, Weibull, lognormal, and log-logistic, (b) Which distribution provides a reasonable fit to the data? Estimate graphically the parameters of the distribution chosen
