Calculating Mean Study Hours

In a recent study on the number of hours students study each week, the following data was collected from a sample of 10 students: 6, 7, 8, 9, 9, 10, 10, 11, 12, and 15 hours. Use this data set to answer the following questions.

Calculate the mean (average) number of hours studied by the students. Your answer should be a decimal to two places.