Penicillin yield by block and treatment
The production of penicillin uses a raw material, corn steep liquor, is quite variable and can only be made in blends sufficient for four runs. There are four processes, A, B, C and D, for the production.
data(penicillin)
A data frame with 20 observations on the following 3 variables.
treata factor with levels A B C D
blenda factor with levels Blend1 Blend2 Blend3 Blend4 Blend5
yielda numeric vector
Box, G., W. Hunter, and J. Hunter (1978). Statistics for Experimenters. New York: Wiley.
data(penicillin) ## maybe str(penicillin) ; plot(penicillin) ...
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