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: [136.024, 191.168, 157.037, -89.703, 28.159, 159.426, 64.25, 115.458, 95.064]

95.209