Description

Appearance of panels after exposure to weather

Format

A data frame with 36 observations on the following 2 variables.

form

formulation of paint - a factor with levels A, B and C

rating

appearance rating

Details

One way to test the durability of a new auto paint formulation is to hang coated test panels outside and expose them to the elements. After some time has passed the appearance of the panels are rated. If their appearance is poor then that formulation is not desirable.

References

Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)

Examples