mean value of the weekly income of 40 families in 265.but in the calculation income of one family was read as 150 instead of 113 .find the correct mean
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mean income of 40 families =265
sum of income of 40 families =40×265=10600
when it is mis read as 150 instead of 113,then the correct sum will be =10600-150+113=10563
the correct mean =10563/40=264.0615 (approx)
sum of income of 40 families =40×265=10600
when it is mis read as 150 instead of 113,then the correct sum will be =10600-150+113=10563
the correct mean =10563/40=264.0615 (approx)
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