ballbearings: Ball Bearing Reliability Data (210 records by 11 variables)

In javiercara/DisRegETSII: Funciones y datos de la asignatura "Diseno de Experimentos y Modelos de Regresion" de la ETSII-UPM

Description

Each record contains the results of a test of a set of ball bearings. The quantities L10 and L50 are estimated percentiles of the fatigue failure distribution (obtained by fitting a Weibull distribution to the fatigue failure times, separately in each set). The objective is to analyse ln(L10) (and separately ln(L50)) by linear regression on the logarithms of P, Z and D, which are characteristics of the ball bearings. Differences between companies and between types of bearing can be tested. PEDAGOGICAL NOTES: Additional information about these data can be found in the "Datasets and Stories" article "Modeling the Reliability of Ball Bearings" in the Journal of Statistics Education (Caroni 2002, www.amstat.org/publications/jse/v10n3/datasets.caroni.html).

Usage

data(ballbearings)

Format

Lista con los siguientes campos:

Source

Lieblein, J., and Zelen, M. (1956), Statistical investigation of the fatigue life of deep-groove ball bearings, Journal of Research of the National Bureau of Standards, 57, 273-316.

Examples

data(ballbearings)
lm( log(L10) ~ log(D) + log(Z) + log(P) , data=ballbearings)

javiercara/DisRegETSII documentation built on Feb. 9, 2020, 12:48 p.m.