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.
[-31.002, 218.225, -44.454, 86.173, 68.865, 207.24, 148.955, -94.882]