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A city built a new parking garage in a business district

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A city built a new parking garage in a business district. For a random sample of 64 days, daily fees collected averaged $2,000, with a standard deviation of $400.

(a) Construct a 90% confidence interval estimate of the mean daily parking fees collected. (Round the lower bound and upper bound of the confidence interval to two decimal places) Include description of how confidence interval was constructed.

(b) Describe the confidence interval in everyday language.

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(a) The confidence interval for the mean is given as:

(x ...

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