EngrExpt (version 0.1-6)

curl: Curl of transparencies

Description

The current formulation of a coating on transparencies used in ink-jet printers causes them to curl. These data are from experiments conducted on a new formulation of the coating.

References

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

Examples

str(curl)
xtabs(~ catalyst + compa, curl)   ## display the experimental design
xyplot(curl ~ compa | ordered(catalyst), curl,
       type = c("g","p","r"), layout = c(3,1),
       xlab = "Amount of component `a' - panels are amount of catalyst",
       ylab = "Amount of curl")