fluoride {EngrExpt}

Fluoride levels from water sources

Description

Fluoride levels from water sources

Format

A data frame with 58 observations on the following 2 variables.

source

a factor with levels A B C

fluoride

a numeric vector

References

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

Examples

str(fluoride)