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: [17.344, 33.585, 60.29, -26.858, 48.603, 104.119, 95.862, 156.352]

61.162