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: [96.578, 41.49, -50.833, 101.795, 86.169, 124.998, 117.269, 123.147, 164.633, -67.181]

73.806