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.

[-92.167, -67.984, -31.831, -21.057, 101.792, 114.116, 185.901, -25.874]
20.362

[126.198, -70.303]
27.947

[162.754, -8.002, 238.908, -73.935, 140.445, -5.391]

75.796