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: [131.164, 99.999, 138.488, 57.264, -40.069, -82.402, -42.836]

Answer: 37.373


Question: [1.222, 33.339, 163.969]

Answer: 66.177


Question: [243.593, 73.842, 233.891, 207.996, 9.099, -15.81, 236.911, 152.289, -3.803]

Answer:
126.445