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: [157.14, 120.799, -55.651, -50.479, 89.067, 192.279, 57.227, 137.972]

Answer: 81.044

Question: [-28.295, -24.828, -66.96, -12.108, -96.597, 110.99, 172.86, -18.752, 157.717]

Answer: 21.559

Question: [69.721, 116.583, 63.325, -2.991, -54.502, -56.366, 169.392, 172.724, 185.307]

Answer:
73.688