Comparison of in-field and laboratory measurement of defects
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.
data(alaska.pipeline)
A data frame with 107 observations on the following 3 variables.
Depth of defect as measured in field
Depth of defect as measured in lab
One of 6 batches
From an example in Engineering Statistics Handbook from http://www.itl.nist.gov/div898/handbook/
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))
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