ex0211: Lifetimes of Guinea Pigs

In Sleuth2: Data Sets from Ramsey and Schafer's "Statistical Sleuth (2nd Ed)"

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

ex0211

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

str(ex0211)

Example output

'data.frame':	122 obs. of  2 variables:
 $ Lifetime: num  18 36 50 52 86 87 89 91 102 108 ...
 $ Group   : Factor w/ 2 levels "bacilli","control": 2 2 2 2 2 2 2 2 2 2 ...

Sleuth2 documentation built on May 2, 2019, 7:01 a.m.