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: [-58.728, -72.265, -14.881, -52.66, 154.535, 121.833, -39.542]
A:
5.47