EngrExpt: diameter – R documentation

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diameter

Diameter of product

Description

The diameter of tracking balls for computer mice from two different production lines. The nominal diameter of the ball is 2 cm.

Format

A data frame with 20 observations on the following 2 variables.

line: a factor with levels A B
diameter: diameter of the tracking ball (cm.)

References

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

Examples

str(diameter)
dotplot(line ~ diameter, diameter, type = c("p","a"),
        jitter.y = TRUE, aspect = 0.2, ylab = "Line",
        xlab = "Diameter of tracking ball (cm.)")
bwplot(line ~ diameter, diameter, type = c("p","a"),
       jitter.y = TRUE, aspect = 0.2, ylab = "Line",
       xlab = "Diameter of tracking ball (cm.)")

EngrExpt

Data sets from "Introductory Statistics for Engineering Experimentation"

v0.1-8

GPL (>= 2)

Authors

R port by Douglas Bates <bates@stat.wisc.edu> and Karen A.F. Copeland <karen@boulderstats.com>

Initial release

2009-08-21