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: [-71.118, 160.927, 230.116, -26.655, -4.297, 64.272, 72.304, 41.517, 242.068]

SOLUTION: 78.793

PROBLEM: [84.142, -99.804]

SOLUTION: -7.831

PROBLEM: [65.996, -85.885, 34.395, 55.128, 216.067, -4.933, -30.061, -57.437, 142.772]

SOLUTION:
37.338