The mean of 100 observations was 40. It was found later on that one of the observation was misread as 83 in place of 53. The correct mean is
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The mean of 100 observations was 40. It was found later on that one of the observation was misread as 83 in place of 53. The correct mean is
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x-30=4000 x=4000+30 x=4030 correct mean is x/100 4030/100 mean=40.30