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.
A data frame with 50 observations on the following 2 variables.
failure times of bearings (millions of cycles)
a factor with levels
Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.
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.