Answer:
The mean increases from 35.56 to 37.75.
Step-by-step explanation:
Assume that only the 18 is an outlier. If this is the case, then the mean is (18 + 38 + 38 + 40 + 44 + 44 + 44 + 46 + 48) / 9, or 35.56.
If the outlier 18 is removed, then the mean is
(38 + 38 + 40 + 44 + 44 + 44 + 46 + 48) / 8, or 37.75.
The mean increases from 35.56 to 37.75.
