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: [-71.767, 93.635, 106.931, -66.434, -52.767, 211.46, 114.457, -90.156, 3.098, 94.998]

34.346