bearings: It is from Lieblein and Zelen (1956).
These data are deep-groove ball bearings failure times (number of millions of revolutions) in eudurance tests.
glassfiber1.5 and glassfiber15: They are from Smith and Naylor (1987).
These data sets are from experimental data for the strength of glass fiber of length 1.5cm and 15cm, respectively.
urinary: It is from Santiago and Smith (2013).
It is about the days in between discharge of males in nosocomial urinary tract infections in patients.
radiotherapy and radio.chemotherapy: They are from Finkelstein, D. M. (1986)
and Lindsey, J. C. and L. M. Ryan (1998).
These data are interval-censored observations from a study of patients with breast cancer.
The measurement is the time to cosmetic deterioration of the breast for women who received radiotherapy
and women who received radio-chemotherapy.
WdataLieblein, J. and M. Zelen (1956). Statistical Investigation of the Fatigue Life of Deep-Groove Ball Bearings. Journal of Research of the National Bureau of Standards, 57 (5), 273-316.
Smith, R. L. and J. C. Naylor (1987). A comparison of maximum likelihood and Bayesian estimators for the three-parameter Weibull distribution. Journal of the Royal Statistical Society. Series C (Applied Statistics), 36 (3), 358-369.
Santiago, E. and J. Smith (2013). Control Charts Based on the Exponential Distribution: Adapting Runs Rules for the t Chart, Quality Engineering, 25 (2), 85-96.
Finkelstein, D. M. (1986), A proportional hazards model for interval-censored failure time data. Biometrics, 42, 845-865.
Lindsey, J. C. and L. M. Ryan (1998). Tutorial in biostatistics: Methods for interval-censored data. Stat. Med., 17, 219-238.
# Attach data sets
attach(Wdata)
bearings
glassfiber1.5
glassfiber15
urinary
radiotherapy
radio.chemotherapy
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