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: [-19.13, 98.86, 158.686, 230.23]

Answer: 117.161


Question: [-56.201, -77.67, -75.53, -51.92, 146.416, 141.525]

Answer: 4.437


Question: [76.436, 89.984]

Answer:
83.21