Description

Moisture content of a silica product

Format

A data frame with 8 observations on the following 5 variables.

temp

temperature in degrees Fahrenheit - an ordered factor with levels 200 < 300

speed

process speed - an ordered factor with levels A and B

solids

percent solids - an ordered factor with levels 10 < 15

pH

pH of the process - an ordered factor with levels 6.5 < 7

moisture

moisture content of the product

Details

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.

References

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

Examples