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: [195.601, 160.736, 226.199, 210.345, -39.117, 174.994, 65.596, 41.928, 141.095, 197.382]

137.476