Parking part 2 suppose that for budget planning purposes, Ask an Expert

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Parking, part 2. Suppose that for budget planning purposes the city in Exercise 23 needs a better estimate of the mean daily income from parking fees.

a) Someone suggests that the city use its data to create a 95% confidence interval instead of the 90% interval first created. How would this interval be better for the city? (You need not actually create the new interval.)

b) How would the 95% confidence interval be worse for the planners?

c) How could they achieve a confidence interval estimate that would better serve their planning needs?

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