Instructions: 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: [84.834, -93.349, 248.651, -61.657, -39.45, 220.796, -81.712, 160.468]
Output:
54.823