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: [149.49, -9.978, 18.085, 6.166, -24.323, 150.907, 160.705, 107.408]

69.808