| water {EngrExpt} | R Documentation |
Bacteria concentrations in water samples
A data frame with 50 observations on the following variable.
bacteriaPeter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
str(water)
qqmath(~ bacteria, water, aspect = 1,
xlab = "Standard normal quantiles",
ylab = "Bacteria concentration (ppm)")
histogram(~ bacteria, water, breaks = 0:14 - 0.5,
xlab = "Bacteria concentration (ppm)")
xtabs(~ bacteria, water)