tennis: Durability of tennis ball covers

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

Description

Durability of tennis ball covers

Format

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

type

a factor with levels A, B, C and D

wear

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(tennis)

Example output

Loading required package: lattice
'data.frame':	20 obs. of  2 variables:
 $ type: Factor w/ 4 levels "A","B","C","D": 1 1 1 1 1 2 2 2 2 2 ...
 $ wear: int  135 121 113 151 113 170 211 149 200 185 ...

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