| Word | Informal Definition | Formal Definition | Illustration | Links |
| Mean | Another word for average. | In a data set, the sum of all the data points, divided by the number of data points |  |
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| Median | The middle number | The median of a set of numbers is the value for which half the numbers are larger and half are smaller. If there are two middle numbers, the median is the arithmetic mean of the two middle numbers |
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| Range | In {4, 6, 9, 3, 7} the lowest value is 3, and the highest is 9, so the range is 9-3 equals 6. | In statistics, the difference between the largest and the smallest numbers in a data set. |  |
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| Survey | A method of gathering information about a group | To gather information by individual samples so as to learn about the whole thing. |  |
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| mode | The number that occurs the most often in a list.
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the number (or numbers) that occurs most frequently in a set of data. |  |
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Pat,
You continue to create meaningful vocabulary collections. These will be such a help to your students. Providing the definition in 2 ways and then a visual representation will really help student understanding!
Judy
Comment by Judy — October 31, 2009 @ 5:50 pm |