Question

30) Parking Hoping to lure more shoppers downtown, a city uilds 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?

Answer 1

米(nNon data Pilaa. 2688く从く129 d.7312):090 , 2.4.2312)

90% CFA 1 2688 19. 7st2 intenun( し12.2.269.9, 129-7312] and movimum $129.73/2