Parking hoping to lure more shoppers downtown, a city builds a new public parking garage in the central business district. the city plans to pay for the structure through parking fees. during a two-month period (44 weekdays), daily fees collected averaged $126, with a standard deviation of $15. a) what assumptions must you make in order to use these statistics for inference? b) write a 90% confidence interval for the mean daily income this parking garage will generate. c) interpret this confidence interval in context. d) explain what “90% confidence” means in this context. e) the consultant who advised the city on this project predicted that parking revenues would average $130 per day. based on your confidence interval, do you think the consultant was correct? why?