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.
[62.228, 221.223, 103.235, -32.414, -17.824, 165.768, 79.827, 163.414]