alaska.pipeline {UsingR}

Comparison of in-field and laboratory measurement of defects

Description

The Alaska pipeline data consists of in-field ultrasonic measurements of the depths of defects in the Alaska pipeline. The depth of the defects were then re-measured in the laboratory. These measurements were performed in six different batches.

Usage

data(alaska.pipeline)

Format

A data frame with 107 observations on the following 3 variables.

field.defect

Depth of defect as measured in field

lab.defect

Depth of defect as measured in lab

batch

One of 6 batches

Source

From an example in Engineering Statistics Handbook from http://www.itl.nist.gov/div898/handbook/

Examples

data(alaska.pipeline)
res = lm(lab.defect ~ field.defect, alaska.pipeline)
plot(lab.defect ~ field.defect, alaska.pipeline)
abline(res)
plot(fitted(res),resid(res))