Minitab
The regular regression output from Minitab identifies unusual observations.
In this case, the outlier observation is identified as having an unusual X value.
Indeed, scoring 4 on a twenty-item true/false test would be unusual.
Minitab also calculates outlier indices and adds them to the dataset.
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Excel
Excel has no special tools for identifying outliers. Examine the
scatterplot for outliers.
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