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: [213.2, 159.287, 214.859, 189.464, 185.706, -85.847, 215.647, 8.545]

SOLUTION: 137.608

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

SOLUTION: 36.267

PROBLEM: [191.796, 24.742, 60.847, -55.812, -15.205, 210.884, 5.463, 84.361]

SOLUTION:
63.384