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: [145.185, 118.59, 52.242, 148.526, 2.774, 248.876, -68.243, 199.455]

105.926