Description

Data consist of times to fatigue failure (in units of millions of cycles) for 10 high-speed turbine engine bearings made from five different compounds.

Usage

Format

A data frame with 50 observations on the following 2 variables.

Time

failure times of bearings (millions of cycles)

Compound

a factor with levels "I", "II", "III", "IV" and "V"

Source

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.

References

McCool, J.I. (1979). Analysis of Single Classification Experiments Based on Censored Samples from the Two-parameter Weibull Distribution, Journal of Statistical Planning and Inference 3(1): 39–68.

Examples