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What do you mean by Dispersion. Give the meaning of Absolute Measure and Relative Measure with example.

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Dispersion is a measure of the extent to which the individual item vary from a central value Dispersion is used in two senses, (i) difference between the extreme items of the series and (ii) average of deviation of items from the mean. 

Absolute Measure : The figure showing the limit or magnitude of dispersion is known as absolute measure and it is shown in the same unit as ;those of the original data, exampple e measures of dispersion in the age of students, their height, weight etc.

Relative Measure : For comparative study the concerning absolute measure is divided by the corresponding mean or some other characteristic value to obtain a ratio or percentage, which is known as the relative measure.

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