There are three fundamental causes for outliers:
A) Data-entry errors were made by the researcher.
B) The participant is not a member of the population for which the sample is intended.
C) The participant is simply different from the remainder of the sample.
D) All three are correct.

Question

Quizplus · Accepted Answer

Outliers can indeed result from data-entry errors (A), cases where a participant does not belong to the target population (B), and instances where a participant is significantly different from the rest of the sample (C). Therefore, all three reasons are fundamental causes for outliers.

There Are Three Fundamental Causes for Outliers