Description

The data are survival times (in days) of guinea pigs that were randomly assigned either to a control group or to a treatment group that received a dose of tubercle bacilli.

Usage

Format

A data frame with 122 observations on the following 2 variables.

Lifetime

survival time of guinea pig (in days)

Group

a factor with levels "bacilli" and "control", indicating the group to which the guinea pig was assigned

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

Doksum, K. (1974). Empirical Probability Plots and Statistical Inference for Nonlinear Models in the Two–sample Case, Annals of Statistics 2: 267–277.

Examples