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.

[150.321, 169.658, 221.448, 54.785, 160.245, 9.534, 78.865, 229.753, 225.969]
144.509

[242.148, 97.472, -15.031, 246.784, 54.233, -27.114]
99.749

[235.595, 227.906, -52.328, 100.922, 124.177, 149.582, -41.738]

106.302