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The table below contains the amount that a sample of nine customers spent for lunch ($)...

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Statistics

The table below contains the amount that a sample of ninecustomers spent for lunch ($) at a fast-food restaurant:

4.88 5.01 5.79 6.35 7.39 7.68 8.23 8.71 9.88

a. Compute the sample mean and sample standard deviation of theamount spent for lunch.

b. Construct a 99% confidence interval estimate for thepopulation mean amount spent for lunch ($) at the fast-foodrestaurant, assuming the population is normally distributed.

c. Interpret the interval constructed in (b).

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