Alaska pipeline faults (Data file: pipeline) This example compares in-field ultrasonic measurements of the depths of defects, Field, in the Alaska oil pipeline with measurements of the same defects in...

Alaska pipeline faults (Data file: pipeline) This example compares in-field ultrasonic measurements of the depths of defects, Field, in the Alaska oil pipeline with measurements of the same defects in a laboratory, Lab. The lab measurements were done in six different batches, in the variable Batch. The goal is to decide if the field measurement can be used to predict the more accurate lab measurement. The lab measurement is the response variable and the field measurement is the predictor variable. The data are from the National Institute of Science and Technology (2012, section 6).