Sleuth2: case1102 – R documentation

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case1102

The Blood–Brain Barrier

Description

The human brain is protected from bacteria and toxins, which course through the blood–stream, by a single layer of cells called the blood–brain barrier. These data come from an experiment (on rats, which process a similar barrier) to study a method of disrupting the barrier by infusing a solution of concentrated sugars.

Usage

case1102

Format

A data frame with 34 observations on the following 9 variables.

Brain: Brain tumor count (per gm)
Liver: Liver count (per gm)
Time: Sacrifice time (in hours)
Treat: Treatment received
Days: Days post inoculation
Sex: Sex of the rat
Weight: Initial weight (in grams)
Loss: Weight loss (in grams)
Tumor: Tumor weight (in 10^(-4) grams)

Source

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

Examples

str(case1102)

plot(Brain/Liver ~ Time, case1102, log="xy", pch=ifelse(Treat=="BD", 19,21))
legend(10,0.1, pch=c(19,21), c("Saline control", "Barrier disruption"))

Sleuth2

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

v2.0-5

GPL (>= 2)

Authors

Original by F.L. Ramsey and D.W. Schafer; modifications by Daniel W. Schafer, Jeannie Sifneos and Berwin A. Turlach; vignettes contributed by Nicholas Horton, Kate Aloisio and Ruobing Zhang, with corrections by Randall Pruim

Initial release

2019-01-24