penicillin {faraway}

Penicillin yield by block and treatment

Description

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.

Format

A data frame with 20 observations on the following 3 variables.

treat

a factor with levels A B C D

blend

a factor with levels Blend1 Blend2 Blend3 Blend4 Blend5

yield

a numeric vector

Source

Box, G., W. Hunter, and J. Hunter (1978). Statistics for Experimenters. New York: Wiley.

Examples

data(penicillin)
## maybe str(penicillin) ; plot(penicillin) ...