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: [-57.148, -59.655, 208.462, 223.004, 100.684, 188.569]

Answer: 100.653


Question: [-86.423, 157.154, 69.563, -67.516, 147.66, 216.018, 213.404]

Answer: 92.837


Question: [144.721, 240.842, -61.62, 128.1, 66.188, 74.919, 214.142, 186.413, 215.112]

Answer:
134.313