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: [211.292, 92.275, 128.423, 242.327, -54.053, 89.501, 64.784]

Answer: 110.65


Question: [-53.388, 31.309, 19.079, -16.926, 242.421, 210.599]

Answer: 72.182


Question: [-3.836, 37.067, -16.403, 208.203, 178.783, 5.204, 83.722, 39.753, 19.525]

Answer:
61.335