Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. These data are contained in the file named Houston. Based upon past studies the population standard deviation is known with σ = $15.
Click on the webfile logo to reference the data.
Round your answers to two decimal places. Use the critical value with three decimal places.
a. At 99% confidence, what is the margin of error?
b- Develop a 99% confidence interval estimate of the mean amount spent for lunch.
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