Which of the Following Statements Could Be an Explanation for the Presence

Multiple Choice

Which of the following statements could be an explanation for the presence of an outlier in the data?

A) The measurement may be correct and from the same population as the rest but represents a rare event. Generally, we accept this explanation only after carefully ruling out all others.
B) The measurement is incorrect. It may have been observed, recorded, or entered into the computer incorrectly.
C) The measurement belongs to a population different from that from which the rest of the sample was drawn.
D) All of the above are explanations for outliers.