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survival analysis 2. Problem 2.2 in KSLM: The time in days to development of a tumor for rats exposed to a carcinogen follows a Weibull

survival analysis
2. Problem 2.2 in KSLM: The time in days to development of a tumor for rats exposed to a carcinogen follows a Weibull distribution with o: = 2 and A = 0.001. (a) 1What is the probability a rat will be tumor free at 30 days? 45 days? GU days? (b) 1What is the mean time to tumor? (Hint: you can calculate values from the gamma function in R)

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