EngrExpt (version 0.1-6)

cheese: Percentage fat in cheese

Description

A manufacturer of cheese supplies a major pizza chain from three different manufacturing locations. Samples from 6 different batches at each of three different plants were assayed for the percentage fat content.

References

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

Examples

str(cheese)
bwplot(batch ~ fat|plant, cheese, layout = c(1,3), strip = FALSE,
       strip.left = TRUE,
       xlab = "Percentage fat content of batches from three plants")
dotplot(reorder(reorder(plant:batch, fat), as.numeric(plant)) ~ fat |
        reorder(plant, fat), cheese, strip = FALSE, strip.left = TRUE,
        layout = c(1, 3), scales = list(y = list(relation = "free")),
        aspect = 0.2, type = c("p", "a"), xlab =
"Percentage fat content - lines join mean fat content per batch",
        ylab = "Batch within plant", jitter.y = TRUE)