The mean of a set of numbers is the sum divided by the number of terms.
6.8+5.9+6.5+3.7+5.9+66
Step 2
Simplify the numerator.
Add 6.8 and 5.9.
12.7+6.5+3.7+5.9+66
Add 12.7 and 6.5.
19.2+3.7+5.9+66
Add 19.2 and 3.7.
22.9+5.9+66
Add 22.9 and 5.9.
28.8+66
Add 28.8 and 6.
34.86
34.86
Step 3
Divide34.8 by 6.
5.8
Step 4
The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.