3. during spring 2016, 90 randomly selected purdue undergraduates were asked if, in a typical day, they watch something on an actual television set. a similar survey of 68 purdue staff members was also conducted. the results are recorded in the purdue tv watchers dataset. use minitab to compute a 99% confidence interval based on these samples for the difference between the proportion of undergraduates and staff members who watch something on a tv set in a typical day and give an interpretation of your interval. in particular, are we 99% confident that a higher percentage of staff members watch a tv on a typical day than undergrads