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: [84.527, 159.538, -20.208, 42.181, -12.587, -86.549, 131.349, 63.615, 150.304]

SOLUTION: 56.908

PROBLEM: [226.287, 114.252, -53.47, 8.606, 234.708, -31.872, 163.615]

SOLUTION: 94.589

PROBLEM: [21.445, -36.626, 184.86, 72.243, 229.642, -85.168, 133.183, 9.889, 222.113]

SOLUTION:
83.509