rubber {EMSaov}

Split-split plot design of Curerate index

Description

A study of the cure rate index on some samples of rubber. Three laboratories, three temperatures and three types of mix were involved. Once a temperature was set, all three mixes were subjected to that temperature and then another temperature was set and again all three mixes were involved, finally the third temperature was set.

Usage

data("rubber")

Format

A data frame with 108 observations on the following 5 variables.

cure

a numeric vector

Rep

a factor with levels I II III IV

Lap

a numeric vector

Temp

a numeric vector

Mix

a factor with levels A B C

References

Fundamental Concepts in the Design of Experiments (3rd ed.) - Charles R. Hicks

Examples

data(rubber)
## maybe str(rubber) ; plot(rubber) ...