Selikoff's data, two-way contingency table.

Description

The data set consists of 4 rows and 5 columns. The rows represent the degree of severity of asbestosis and the columns are concerned with the time of exposure to asbestos of workers

Usage

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Format

The format is: row names [1:4] "None" "Grade1" "Grade2" "Grade3"
col names [1:5] "0-9" "10-19" "20-29" "30-39" "40+"

References

Selikoff IJ 1981 Household risks with inorganic fibers. Bulletin of the New York Academy of Medicine, 57, 947 – 961.
Beh EJ and Lombardo R 2014 Correspondence Analysis: Theory, Practice and New Strategies. John Wiley & Sons.

Examples

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asbestos <-
structure(c(310, 36, 0, 0, 212, 158, 9, 0, 21, 35, 17, 4, 25, 
102, 49, 18, 7, 35, 51, 28), .Dim = 4:5, .Dimnames = list(c("none", 
"grade1", "grade2", "grade3"), c("0-9", "10-19", "20-29", "30-39", 
"40+")))
dim(asbestos)
dimnames(asbestos)