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: [84.527, 159.538, -20.208, 42.181, -12.587, -86.549, 131.349, 63.615, 150.304]

Answer: 56.908


Question: [-31.252, 246.934, 96.512, 19.356, -50.759, 134.528, 176.914, 17.007, 171.802]

Answer: 86.782


Question: [130.499, 23.812, 188.301, 110.955, 131.399, 21.009, -0.771, -10.069, 198.135]

Answer:
88.141