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mean

Language/Type: Java ArrayList collections
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Author: Eric Roberts (on 2017/06/23)

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

Method: Write a Java method as described, not a complete program or class.

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