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: [20.796, 39.383, -26.46, -27.224, 89.591, 87.502, 211.781, 127.87, 223.38]

Answer: 82.958

Question: [70.553, 193.054, 166.173, 115.812]

Answer: 136.398

Question: [-61.892, 158.927, 7.47, 211.832, 156.964, 50.793, 86.636, 33.142, 151.127, 117.796]

Answer:
91.28