Data from the famous doctors study of smoking conducted by Sir Richard Doll and colleagues
tibble with 10 observations and the following 4 variables.
smoker or non-smoker
number of deaths
person years of of observation at the time of the analysis
Breslow, N. E. and N. E. Day (1987). Statistical Methods in Cancer Research, Volume 2: The Design and Analysis of Cohort Studies. Lyon: International Agency for Research on Cancer.
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