the mean of 20 observation is 54 if one observation 42 is misread as 24 find the Newmean
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A.M of 20 no's = 54
Total of 20 = 20×54 = 1080
Corrected total = 1080-42+24
= 1062
Corrected mean = 1062/20 = 53.1
Total of 20 = 20×54 = 1080
Corrected total = 1080-42+24
= 1062
Corrected mean = 1062/20 = 53.1
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