Students in a class were asked how many hours a week they studied. Their answers are given below: 0, 5, 1, 2, 4, 0, 1, 3, 2, 2, 0, 1, 5, 3, 4, 4, 2, 1, 6 What is the population mean of the number of hours they studied? Explain how you arrived at your answer and round to the nearest tenth.