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Question

Calculate the mean deviation about the mean for the following frequency distribution :

Class Interval :044881212161620Frequency :46852

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Solution

ClassfMidpointfixi|xi9.2|fi|xi9.2|044287.228.84866363.219.2812810800.86.41216514704.824.01620218368.817.6N=25Total = 230Total = 96.0

Mean =23025=9.2

M.D.=9625=3.84


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