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.
Input: [168.495, -45.259, 233.021, 210.029, -68.468, 222.516, 115.562, 182.961, 228.467, 54.633]

130.196