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: [38.015, 202.242, 68.286, 170.779, 62.891, 161.487, 79.159, -30.986]

93.984