score on last try. 101 5 PLS. See Details 101 > Next question Get a similar question You can retry this question below For a 4-unit class like Statistics, students should spend average of 12 hours studying for the class. A survey was done on 26 students, and the distribution of total study hours per week is bell-shaped with a mean of 12 hours and a standard deviation of 3.5 hours. Use the Empirical Rule to answer the following questions. a) 68%% of the students spend between 8.5 hours and 15.5 hours on Statistics each week. b) 95% of the students spend between hours and hours on Statistics each week. c)'99.7% of the students spend between hours and hours on Statistics each week. Question Help: _ Written Example Message instructor