Answer the following Q with stream of consciousness. Passage: In statistics, an outlier is an observation point that is distant from other observations. An outlier may be due to variability in the measurement or it may indicate experimental error; the latter are sometimes excluded from the data set.

Question: Based on this passage, when is a data point considered an outlier?
This is the relevant information: In statistics, an outlier is an observation point that is distant from other observations. Therefore, the final answer is an observation point that is distant from other observations.