Moisture content of a silica product
A data frame with 8 observations on the following 5 variables.
temperature in degrees Fahrenheit - an ordered
factor with levels
process speed - an ordered factor with levels
percent solids - an ordered factor with levels
pH of the process - an ordered factor with levels
moisture content of the product
These data were collected from an experiment run in a pilot plant to try to increase the moisture content of a product through production changes.
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)