| surfarea {EngrExpt} | R Documentation |
Measurements of the surface area, in m^2/g, of samples of silica, a chemical product with many applications, such as a filler in rubber products. The surface area is a key property of the product.
A data frame with 32 observations on the following variable.
areaPeter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
str(surfarea)
with(surfarea, summary(area))
qqmath(~ area, surfarea, aspect = 1, type = c("g", "p"),
xlab = "Standard normal quantiles",
ylab = expression("Surface area " * (m^2/g) *
" of batches of silica"))
print(qqmath(~ area, surfarea, aspect = 1, type = c("g", "p"),
xlab = "Standard normal quantiles",
ylab = expression("Surface area " * (m^2/g))),
pos = c(0,0,0.33,1), more = TRUE)
print(densityplot(~ area, surfarea,
xlab = expression("Surface area "*(m^2/g)*
" of batches of silica")),
pos = c(0.3,0,1,1))