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The variance and mean of 15 observations are respectively 6 and 10 . If each observation is increase by 8 then the new variance and new mean of resulting observations are respectively
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The correct answer is:
6,18
The new mean will be increased by 8
i.e., new mean becomes $10+8=18$
But, new variance will remain unchanged
Hence, new variance $=6$
i.e., new mean becomes $10+8=18$
But, new variance will remain unchanged
Hence, new variance $=6$
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