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mean

Language/Type: Python lists
Author: Eric Roberts (on 2017/07/08)

Write a function named mean that accepts a list of numbers as a parameter and returns the arithmetic mean (average) of the numbers in the list as a number. For example, if the list passed contains [2.0, 4.5, 6.5, 1.0], your function should return 3.5. If the list is empty, return 0.0. Do not modify the list that is passed in.

Function: Write a Python function as described, not a complete program.

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