yellow {EngrExpt}

Initial and 1 month color measure of coated lens

Description

Initial and 1 month color measure of coated lens

Format

A data frame with 23 observations on the following 2 variables.

b1

a numeric vector of initial color measurements

b2

a numeric vector of color measurements after one month

Details

It is undesirable to see color changes in a lens over time.

References

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

Examples

str(yellow)
show(plt1 <- xyplot(b2 ~ b1, yellow, aspect = 'iso', type = c("g","p"),
                    xlab = "Initial color measure of lens",
                    ylab = "Color measure after 1 month"))
show(tmd(plt1))