Hoping to lure more shoppers downtown, a city builds a new public parking garage

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.

1. What assumptions must you make in order to use statistics for inference?

2. Write a 90% confidence interval for the mean daily income this parking garage will generate.

3. Explain in context what this confidence interval means

4. Explain what 90% confidence means in this context.

1. The consultant who advised the city on this project predicted that parking revenues would average $130 per day. Based on your confidence level, do you think the consultant was correct? Why?