EngrExpt (version 0.1-6)

water: Bacteria concentrations in water samples

Description

Bacteria concentrations in water samples

References

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

Examples

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)