fluoride: Fluoride levels from water sources

In EngrExpt: Data sets from "Introductory Statistics for Engineering Experimentation"

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)

Example output

Loading required package: lattice
'data.frame':	58 obs. of  2 variables:
 $ source  : Factor w/ 3 levels "A","B","C": 1 1 1 1 1 1 1 1 1 1 ...
 $ fluoride: num  0.84 0.83 0.75 0.74 0.78 0.9 0.72 0.74 0.82 0.7 ...

EngrExpt documentation built on May 1, 2019, 9:15 p.m.