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.