1.

Find the mean deviation about the mean for the data in Question:

Answer»

SOLUTION :
MEAN `BARX=(sumf_(i)x_(i))/(sumf_(i))=12530/100=125.3`
`:.` Mean DEVIATION `=(sumf_(i)|x_(i)-barx|)/(sumf_(i))=1128.8/100`
`=11.28`


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