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: [-19.488, 162.336, -47.616, 129.178, -46.088, 63.896, -77.495, 190.868]

44.449