Chalk Data

These data involve 11 laboratories and 2 brands of chalk. The laboratories tested the density of the chalk. The main interest was whether the different laboratories yielded the same density for the two different types of chalk.

Format

A data frame with 66 observations on 3 variables.

Density

Numeric density of the chalk.

Lab

Integer laboratory identifier.

Chalk

Factor giving the chalk brand tested (A, B).