Statisticsmedium · Past Paper
The mean of 5 observations is 7. If a new observation 13 is added, the new mean is:
A8
B9
C10
D7.5
✓ Correct Answer: A — 8
Old sum = 35. New sum = 35 + 13 = 48. New mean = 48 / 6 = 8.
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✓ Correct Answer: A — 8
Old sum = 35. New sum = 35 + 13 = 48. New mean = 48 / 6 = 8.
Share this question