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: [-19.64, 5.69, 102.211, 159.062, 7.744, 242.03, 141.431, 105.364, 40.338]

Answer: 87.137


Question: [-40.246, -7.512, 174.245, -98.6]

Answer: 6.972


Question: [83.282, 124.677, 44.957, 35.213]

Answer:
72.032