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: [-62.383, 6.851, -23.476, -11.502, 90.594, 44.388, 118.076, 144.472, 106.395]

45.935