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: [-94.332, 235.196, 71.433, -91.591, 197.609, 16.597, 87.414, 153.654, 227.278, -74.116]

72.914