Question: What is a potential problem with identifying outliers based only on unusual combinations of values? a . It is always a result of data entry

What is a potential problem with identifying outliers based only on unusual combinations of values?
a. It is always a result of data entry errors.
b. It may not reveal outliers that are unusual values for a single variable.
c. It is the only legitimate reason for eliminating outliers.
d. It is easy to detect and deal with.

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