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.
[-81.517, 126.001, 203.19, 236.819, 36.037, 152.691, -1.444, -37.296]