If each observation of a data is increased by 5, then their mean
A. remains the same
B. becomes 5 times the original mean
C. is decreased by 5
D. is increased by 5
Let the observations be x1, x2, x3.........xn
Mean = .....(i)
If each observation is increased by 5, we get,
x1 + 5, x2 + 5, x3 + 5.........xn + 5
⇒ Mean =
Thus, the mean is also increased by 5.
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