Set, Relation and FunctionHard
Question
The mean of the data set comprising of 16 observations is 16. If one of the observation valued 16 is deleted and three new observations valued 3, 4 and 5 are added to the data, then the mean of the resultant data, is :
Options
A.15.8
B.14.0
C.16.8
D.16.0
Solution
∑xi = 256
Let new observations Xi
∑Xi = (256 - 16) + (3 + 4 + 5) = 252
& number of observations 18
∴ New mean =
= 14
Let new observations Xi
∑Xi = (256 - 16) + (3 + 4 + 5) = 252
& number of observations 18
∴ New mean =
= 14Create a free account to view solution
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