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| Term | Definition |
|---|---|
| mean | sum of data divided by number of data items |
| outlier | data item that is much higher or lower than the other items in a set. lies OUTSIDE the majority of the data. |
| median | middle value when data are arranged in numerical order. used mostly when an outlier affects the mean. |
| mode | item or items that occur the most frequently. |
| range | the DIFFERENCE between the largest number and smallest number in a set of data. |
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