R Dataset / Package MASS / coop

On this R-data statistics page, you will find information about the coop data set which pertains to Co-operative Trial in Analytical Chemistry. The coop data set is found in the MASS R package. You can load the coop data set in R by issuing the following command at the console data("coop"). This will load the data into a variable called coop. If R says the coop data set is not found, you can try installing the package by issuing this command install.packages("MASS") and then attempt to reload the data with the library() command. If you need to download R, you can go to the R project website. You can download a CSV (comma separated values) version of the coop R data set. The size of this file is about 4,922 bytes.

Co-operative Trial in Analytical Chemistry

Description

Seven specimens were sent to 6 laboratories in 3 separate batches and each analysed for Analyte. Each analysis was duplicated.

Usage

coop

Format

This data frame contains the following columns:

Lab: Laboratory, L1, L2, ..., L6.
Spc: Specimen, S1, S2, ..., S7.
Bat: Batch, B1, B2, B3 (nested within Spc/Lab),
Conc: Concentration of Analyte in g/kg.

Source

Analytical Methods Committee (1987) Recommendations for the conduct and interpretation of co-operative trials, The Analyst 112, 679–686.

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.

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