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Unit Plan
Other

James Wright: Measures of Central Tendency

For Students 9th - 10th Standards
This site looks at measures of central tendency and dispersion. Discussed are topics such as standard deviation, mean, median, and mode.
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Handout
United Nations

Unesco: Measures of Dispersion

For Students 9th - 10th Standards
Explanation of the different measures of dispersion (range, interquartile range, and standard deviation) are given.