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: [196.683, 97.538, 247.799, 203.036, 203.369, -15.737]

SOLUTION: 155.448

PROBLEM: [-28.295, -24.828, -66.96, -12.108, -96.597, 110.99, 172.86, -18.752, 157.717]

SOLUTION: 21.559

PROBLEM: [9.828, 248.054, 20.871, 99.749, 52.797, -86.856, 65.438, 53.627]

SOLUTION:
57.939