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: [211.927, 190.941, -74.44, 7.991, -80.894, 48.291, 127.383, -51.774]

SOLUTION: 47.428

PROBLEM: [157.423, -98.775, -67.748, 25.759, 24.697, 150.289, -68.457, 212.57, -9.355]

SOLUTION: 36.267

PROBLEM: [172.016, -4.978, 239.077, -13.083, -71.651]

SOLUTION:
64.276