What is the mean deviation about mean for the following discrete frequency distribution? ValueFrequency11102151202302
A
7.1
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B
8
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C
9.34
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D
13
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Solution
The correct option is B 8 ValueFrequencyfixifi|xi−x|1111610220141511522024063026026∑813664 Themean¯x=∑fixi∑fi=1368=17 Mean deviation (Mean) = ∑fi(xi−¯x|∑fi=648=8