the mean of 40 observation was 160. it was detected on rechecking that the value of 165 was wrongly copied as 125 for computation of mean. find correct mean.
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Answered by
37
sum will be 160×40 = 6400
we minus 125 from 6400we get 6275
to get sum we now add 165 and we get 6440
therefore correct mean is 6440 / 40 which is 161
we minus 125 from 6400we get 6275
to get sum we now add 165 and we get 6440
therefore correct mean is 6440 / 40 which is 161
Answered by
32
the correct mean is 161.
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