Ex 15.1, 6 - Find mean deviation about mean - Chapter 15 CBSE - Mean deviation about mean - Discrete Frequency

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Ex 15.1, 6 Find the mean deviation about the mean for the data First we will calculate mean Mean deviation about mean = ( โˆ‘128โ–’๐‘“๐‘–|๐‘ฅ๐‘– โˆ’ ๐‘ฅย ฬ… | )/(โˆ‘128โ–’๐‘“๐‘–) Putting โˆ‘128โ–’๐‘“๐‘–|๐‘ฅ๐‘– โˆ’ ๐‘ฅย ฬ… | = 1280 , โˆ‘128โ–’๐‘“๐‘– = 80 M.D. (๐‘ฅย ฬ…) = 1/80 ร— 1280 = 16

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