TASK DEFINITION: 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.
PROBLEM: [229.28, 202.632, 129.717, 211.459, 203.204]

SOLUTION: 195.258

PROBLEM: [93.048, 173.783, 88.736, -95.085, -77.155, -2.381, -84.313]

SOLUTION: 13.805

PROBLEM: [69.939, -72.602, 60.681, -61.555]

SOLUTION:
-0.884