Textbook Topics: Error in Measurement

Another topic in Chapter 5 of the textbook that interested me was error in measurement.
The textbook stated that no measurement is ever exact and that when we use a device to take a measurement, there is always some error which can be caused by a fault in the measuring device, an inappropriate measuring device, and human error. Exercise 5.02 focuses on error in measurement, specifically absolute error (the greatest possible error or the furtherest by which you can be wrong) and percentage error (size of absolute error as a percentage of the measurement).
This topic interested me as it shows where and how errors in measurement can take place, as well as the fact that to complete the exercise, I actually had to look for errors.