Description Format Source References See Also Examples
Contains the answers of 191 California high school students to the question: "When did you first use marijuana?". An answer can be an exact age, or "I have never used it", which gives rise to a right-censored observation, or "I have used it but cannot recall just when the first time was", which gives rise to a left-censored observation.
A data frame with 21 observations and 3 variables:
L: left-end point of an interval-censored time;
R: right-end point of an interval-censored time;
count: number of students in the interval.
Turnbull and Weiss (1978). See also Klein and Moeschberger (1997), page 17.
Turnbull and Weiss (1978). A likelihood ratio statistic fortesting goodness of fit with randomly censored data. Biometrics, 34, 367-375.
Klein and Moeschberger (2003). Survival Analysis: Techniques for Censored and Truncated Data (2nd ed.). Springer
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