The arithmetic mean of 100 observations is 50. If 10 is added to each observation then what will be the new arithmetic mean?
Answer
The correct answer is C: 60. If a constant is added to each observation, the arithmetic mean also increases by that same constant. So new mean = 50 + 10 = 60.
A.50
B.55
C.60✓ Correct
D.65
Explanation
If a constant is added to each observation, the arithmetic mean also increases by that same constant. So new mean = 50 + 10 = 60.
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