HW 48 An article in Cancer Research Analyses of Litter Match

HW 4.8. An article in Cancer Research [Analyses of Litter Matched Time-to-Response Data, with Modifications for Recovery of Interlitter Information (1977. Vol. 37. pp. 38633868)] tested the tumorigenesis of a drug. Rats were randomly selected from litters and given the drug. The times of tumor appearance were recorded as follows: 101, 104, 104, 77, 89, 88, 104, 96, 82, 70, 89, 91, 39, 103, 93, 85, 104, 104, 81, 67, 104, 104, 104, 87, 104, 89, 78, 104, 86, 76, 103, 102, 80, 45,94, 104, 104, 76, 80, 72, 73 Calculate a confidence interval an the standard deviation of time until a tumor appearance for each of 90%, 95% and 99% confidence level. Compare the length of the interval, what is your conclusion?

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