Hoping to lure more customers to the downtown area

Hoping to lure more customers to the downtown area, the city council has voted to build a new parking garage. They plan to pay for the garage using parking fees. In order to determine what the fees at the new structure should be, the daily fees collected during a three month period (66 weekdays) at another parking facility averaged $126 with a standard deviation of $15. Construct a 95% confidence interval for the average daily parking fees. The consultant, who advised the city on this project, predicted that the parking revenues would average $130 per day. Based on your confidence interval, do you think the consultant was correct? Explain. Twenty-five volunteers who had developed cold symptoms within the last 24 hours were given zinc lozenges to take every 2 to 3 hours until their cold symptoms were gone. The mean overall duration of symptoms was 4.5 days with a standard deviation of 1.6 days. The selected cases have a distribution which appears to be symmetric and bell-shaped. Construct a 99% confidence interval for the mean overall duration of symptoms in a population of individuals who used zinc lozenges. In a previous test, the mean overall duration of symptoms for volunteers who were told to drink an herbal tea for relief of their symptoms was 7 days. Based on your confidence interval, do you think that using the lozenges reduces the overall duration of symptoms compared to using the herbal tea? For the following problems: 1. State the Null Hypothesis and the Alternative Hypothesis 2. Determine the test statistic. 3. Determine the P-value 4. Make a decision regarding the hypotheses based on the P-value and the Level of Significance. In order to monitor the ecological health of the Florida Everglades, various measurements are recorded at different times.