The mean of nine observation was found to be 35. Later on it was discovered that an observation 81 was misread as28 .Find the correct mean of observation
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mean of 9 no. is 35
sum of observation is 35×9=315
if 81 was misread as 28 then sum of observation is
(315-28)+81=287+81=368
then the new mean is 40.88
sum of observation is 35×9=315
if 81 was misread as 28 then sum of observation is
(315-28)+81=287+81=368
then the new mean is 40.88
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