A random sample of 81 bills for meals were obtained at a restaurant. For each of the bills, the tip was found as a percentage of the raw bill (before taxes). Suppose the sample mean tip percentage is 15.98 and the sample standard deviation is 7.9. Does it appear that the population mean tip percentage for this restaurant exceeds the standard 15? Use α = 0.05 to make a conclusion.

Answer rating: 100% (QA)

To determine if the population mean tip percentage for this restaurant exceeds 15 we can conduct a o... View the full answer