A study is done at a college to see how many hours students sleep each night. A random sample of 12 students is surveyed. Each is asked how many hours they slept last night. Here are the results: Student Number Hours of sleep per night 1 10 2 12 3 4 4 8 5 6 6 8 7 6 8 9 9 8 10 6 11 7 12 6 An inference from this study could be: Based on this study, students at this college sleep an average (mean) of _____ hours each night. Type the number that should go in the blank. Round your answer to the nearest tenth. (One digit after the decimal point.)