# R Dataset / Package HSAUR / pistonrings

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## Piston Rings Failures

### Description

Number of failures of piston rings in three legs of four steam-driven compressors.

### Usage

data("pistonrings")

### Format

A two-way classification, see table.

### Details

The data are given in form of a table. The table gives the number of piston-ring failures in each of three legs of four steam-driven compressors located in the same building. The compressors have identical design and are oriented in the same way. The question of interest is whether the two classification variables (compressor and leg) are independent.

### Source

S. J. Haberman (1973), The analysis of residuals in cross-classificed tables. Biometrics 29, 205–220.

### Examples


data("pistonrings", package = "HSAUR")
mosaicplot(pistonrings)
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Dataset imported from https://www.r-project.org.

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