corrosion.data: Corrosion data
In BHH2: Useful Functions for Box, Hunter and Hunter II

Description Usage Format References Examples

Corrosion resistance study data set.

1	data(corrosion.data)

A data frame with 24 observations on the following 4 variables.

run: factor with 6 levels. The casting order.
heats: factor with 3 levels. The casting temperature.
coating: factor with 4 levels. The coating treatment.
resistance: numeric vector. Corrosion resistance response.

Box G. E. P, Hunter, J. S. and Hunter, W. C. (2005). Statistics for Experimenters II. New York: Wiley.

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data(corrosion.data)
str(corrosion.data)
plot(corrosion.data)

'data.frame':	24 obs. of  4 variables:
 $ run       : Factor w/ 6 levels "r1","r2","r3",..: 1 1 1 1 2 2 2 2 3 3 ...
 $ heats     : Factor w/ 3 levels "T360","T370",..: 1 1 1 1 2 2 2 2 3 3 ...
 $ coating   : Factor w/ 4 levels "C1","C2","C3",..: 2 3 1 4 1 3 4 2 3 1 ...
 $ resistance: int  73 83 67 89 65 87 86 91 147 155 ...