tennis {EngrExpt}

Durability of tennis ball covers

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)