Statisticshard · Past Paper
The mean of 10 observations is 15. If one observation 24 is replaced by 34, what is the new mean?
A15
B16
C17
D18
✓ Correct Answer: B — 16
Sum = 10 * 15 = 150. New sum = 150 - 24 + 34 = 160. New mean = 160/10 = 16.
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