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GLMsData (version 1.4)

breakdown: Dialetric breakdown data

Description

The dialetric breakdown strength of electrical insulation

Usage

data(breakdown)

Arguments

Format

A data frame containing 128 observations with the following 3 variables.

Strength

the dialetric breakdown strength, in kiloVolts

Time

the time exposure in weeks; one of 1, 2, 4, 8, 16, 32, 48, or 64

Temperature

the temperature, in degrees Celsius; one of 180, 225, 250 or 275

Details

The data come from a study of performance degradation of electrical insulation from accelerated tests. The study can be considered as a 8-by-4 factorial experiment, with four measurements for each time--temperature combination.

References

Nelson, W. (1981) Analysis of performance-degradation data. IEEE Transactions on Reliability, 2, R-30, 149--155.

The Statistical Reference Datasets page: http://www.itl.nist.gov/div898/strd/nls/data/nelson.shtml.

Examples

Run this code
   data(breakdown)
   summary(breakdown)

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