Detailed Instructions: 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.
Q: [140.249, 34.526, 18.603, -30.895, 217.753, 95.574, -31.568, -38.575, 220.01]
A:
69.52