Question: The file fast food contains the amount that a sample of fifteen customers spent for lunch ($) at a fast food restaurant: 7.42 6.29 5.83

The file fast food contains the amount that a sample of fifteen customers spent for lunch ($) at a fast food restaurant:
7.42 6.29 5.83 6.50 8.34 9.51 7.10 6.80 5.90
4.89 6.50 5.52 7.90 8.30 9.60
a. Construct a 95% confidence interval estimate for the population mean amount spent for lunch ($) at a fast food restaurant, assuming a normal distribution.
b. Interpret the interval constructed in (a).

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