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: [65.591, -56.104, -28.389, -22.521]

SOLUTION: -10.356

PROBLEM: [20.538, 100.835, -23.197, 207.707, -12.758, 152.97, 190.404]

SOLUTION: 90.928

PROBLEM: [162.434, 99.656, 86.665, 13.03, 99.225, 43.608, -41.822, 206.671]

SOLUTION:
83.683