Mean Deviation for Ungrouped and Grouped Data | Measures of Dispersion | Statistics

Note: The shortcut method of finding mean applies only when the class interval are equal

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Mean Deviation gives equal importance to all deviations about mean or about any other point (median)
Standard deviation gives greater weightage to higher deviations about mean

definition of mean deviation, how to find mean data, mean deviation for ungrouped data formula,
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