You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.

[1,3,5]
Solution: 3.000
Why? The mean of the input list is (1+3+5)/3, which equals 3. This is a good example.

New input: [59.225, 44.897, 97.858, -74.683, 228.261, -31.273, 62.844]
Solution:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
55.304