The mean of the data set comprising of 16 observations is 16. If one of the observations valued 16, is deleted and three new observations valued 3,4 and 5 are added to the data set, then the mean of the resultant data is
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Solution
Sum of 16 observations =16×16=256 Sum of resultant 18 observations =256−16+3+4+5 =252 Mean =25218=14