uvoven {EngrExpt}

UV absorbance for lens cured in different ovens

Description

UV absorbance for lens cured in different ovens

Format

A data frame with 60 observations on the following 2 variables.

oven

oven - a factor with levels A B

uv

UV absorbance

References

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

Examples

str(uvoven)
summary(uvoven)
densityplot(~ uv, uvoven, groups = oven, auto.key = list(columns = 2),
            xlab = "UV absorbance")
qqmath(~ uv, uvoven, groups = oven,
       auto.key = list(space = "right", title = "Oven"),
       xlab = "Standard normal quantiles", type = c("p","g"),
       ylab = "UV absorbance",
       panel = function(...)
    {
       panel.qqmath(...)
       panel.qqmathline(..., alpha = 0.5)
    })