Data Displays Summary

There are some features that should be considered when interpreting any data display. A cluster is a point on the display where the data are clustered around a specific value. A gap is an interval on the display where there is no data. An outlier is a data value that is substantially different from the rest of the data. Each of these features should be investigated to determine if it was reported in error or if it has a specific cause.

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Statistics Tutorial: Patterns & Data