I think that we would use the t interval, but I am not 100% sure so any help would be appreciated

You randomly sample 16 students at a local high school. The students in your sample report watching an average of 13 hours of TV per week. Assume that the population standard deviation [0) is 3. a) Which statistic should we use in order to construct a condence interval: 2 or t? Why? b) For the population of students in that school, compute a 98% condence interval [note: not 95%] for the. average hours of TV watched