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: [244.1, -84.018, 7.772, 69.273, 99.397, 158.691, -0.315]

SOLUTION: 70.7

PROBLEM: [41.308, 149.33, -33.086, -10.268, 209.148, -69.203, -68.646, -82.073, 83.754]

SOLUTION: 24.474

PROBLEM: [57.506, 172.357, 191.473, 131.849]

SOLUTION:
138.296