A violin student records the number of hours she spends practicing during each of nine consecutive weeks: 6.2 5.0 4.3 7.4 5.8 7.2 8.4 1.2 6.3 What is the mean number of hours spent practicing per week during this period? a. 6.20 hours b. 6.15 hours c. 8.40 hours d. 5.76 hours

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