The performance of the counters data

Description

A water company from A Corunia wants to control the performance of the counters installed throughout the city. 60 subsamples are taken each one composed by 3 measurements made by the counters of the same antiquity (10 years) and caliber, in a period of 5 years. Taking into account that there are two brands or providers of counters

Format

A data frame with 180 observations on the following 3 variables:

error

the measurement error of the counters (Error: (Real Volume - Measured Volume)/Real Volume)

sample

sample id

brand

brands of providers of counters

Examples

data(counters)
attach(counters)
summary(counters)
plot(error, type="b")
detach(counters)

Results