Lithium Batteries

A manufacturer of lithium batteries has two production facilities, A and B. Fifty randomly selected batteries with an advertised life of 180 hours are selected, and tested. The lifetimes are stored in (facilityA). Fifty ramdomly selected batteries with an advertised life of 200 hours are selected, and tested. The lifetimes are stored in (facilityB).

Format

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

facilityA

life time measured in hours

facilityB

life time measured in hours

Source

Ugarte, M. D., Militino, A. F., and Arnholt, A. T. (2008) Probability and Statistics with R. Chapman & Hall/CRC.

Examples

with(data = Battery,
qqnorm(facilityA))
with(data = Battery,
qqline(facilityA))