instruction:
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.
question:
[-20.155, -42.404]
answer:
-31.28


question:
[47.595, -7.171, 4.333, 160.025, 152.275, 90.23, 128.643, 145.181]
answer:
90.139


question:
[120.548, 104.355, 182.892, 208.827, 78.301, 176.671, 113.25, -33.999, 207.334]
answer:

128.687