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: [70.553, 193.054, 166.173, 115.812]

Answer: 136.398


Question: [-51.625, 100.25, -75.262, -53.896]

Answer: -20.133


Question: [185.65, 59.931, 2.895, -90.678, 23.13, 102.002, 146.218, -5.314, -39.25]

Answer:
42.732