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: [207.804, 175.122, 13.63, 217.625, -98.484]

SOLUTION: 103.139

PROBLEM: [16.256, 155.71, 43.059, -64.109, -42.445, 78.725, -12.941, 47.497]

SOLUTION: 27.719

PROBLEM: [66.647, 247.888, 55.318, 239.152, 111.398, 248.973, 231.76, 40.763]

SOLUTION:
155.237