Answer:
The mean is 15.
Explanation:
Our task is to find the mean of this group of numbers:
11, 17, 13, 16, 18
To find the mean, add all these numbers:
11 + 17 + 13 + 16 + 18
= 75
Next, divide by 5 (because there are 5 numbers in the set):
75 ÷ 5 = 15
Therefore, the mean is 15.