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: [150.321, 169.658, 221.448, 54.785, 160.245, 9.534, 78.865, 229.753, 225.969]

Answer: 144.509


Question: [-11.211, 9.955, 208.942, 124.097, 118.282, 65.001]

Answer: 85.844


Question: [-78.249, 171.613, 113.954, 201.716, 200.834]

Answer:
121.974


