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Find the mean deviation about the mean for the following data : Xi  6

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Find the mean deviation about the mean for the following data :

Xi  6  12  18  24  30  36
fi  5  4  11  6  4  6
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1 Answer

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Best answer

We have,

  Xi  fi  fiXi
6 5  30
12 4 48
18 11 198
24 6 144
30 4 120
36 6 216
36 756

Thus, the required mean deviation about the mean is

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