Purity of product from a filtration process
Purity of product from a filtration process
A data frame with 12 observations on the following 4 variables.
tech
indicator factor for technician
fac1
a factor with 3 levels
fac2
a factor with 2 levels
purity
a response factor
This experiment was run by two technicians to study the impact of two process factors on the purity of the product after filtration.
Peter R. Nelson, Marie Coffin and Karen A. F. Copeland (2003), Introductory Statistics for Engineering Experimentation, Elsevier. (Appendix A)
str(purity)
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