The table below contains the amount that a sample of nine customers spent for lunch ($) at a fast-food restaurant. Complete parts a and b below. 4.85 5.37 5.53 6.77 7.28 7.55 8.39 8.63 9.79 ...... a. Construct a 99% confidence interval estimate for the population mean amount spent for lunch at a fast-food restaurant, assuming a normal distribution. The % confidence interval estimate is from $ to $. (Round to two decimal places as needed.)

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