1. For each of the following types of error, either (i) provide an example of it from the Schober et al. (2003) paper, or (ii) quote a particular passage in Schober et al. (2003) that leads one to believe that this type of error might be present, although insufficient informmation is provided to make a certain determination. (Recognizing that a paper is ambiguous is just as important as understanding what it definitively says.) (2 sentence answer for each type of error.)
1a. Measurement or roundoff error
1b. Sampling error
1c. Human or machine error
1d. Bias (either intentional or unintentional)