This is a data set on the percentage of defective units in the production of ball bearings.
data.ballb
A data frame with six observations on the following two variables:
defbb | share of defective ball bearings (per thousand). |
nshifts | number of shifts between two maintenances. |
In Auer (2023, Chap. 16) and Auer et al. (2024, Chap. 16) these hypothetical data are used to illustrate the consequences of error terms with an expected value deviating from zero.
Auer, L.v., Hoffmann, S. & Kranz, T. (2024): Ökonometrie - Das R-Arbeitsbuch, 2nd ed., Springer-Gabler (https://www.oekonometrie-lernen.de).