The mean of 40 observation was 200 it was detected by rechecking that the value of 65 was wrongly copied as for consumption of mean find the corrected nean
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mean = 40× 200
=8000
incorrect mean = 65 = 8000- 65 = 7935
mean = 7935 / 200
mean = 39.675
=8000
incorrect mean = 65 = 8000- 65 = 7935
mean = 7935 / 200
mean = 39.675
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