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: A8

Old sum = 35. New sum = 35 + 13 = 48. New mean = 48 / 6 = 8.

Share this question

More from Statistics