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.
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Question: [128.328, 20.497, 96.178, 237.663, 80.568, 109.722]

Answer: 112.159


Question: [22.971, 146.947, 84.327, 123.65, -30.682, -43.973, 211.836, 146.398, -65.992]

Answer: 66.165


Question: [-73.875, -22.17]

Answer:
-48.022