1a) Fast-Food Bills for Drive-Thru CustomersA random sample of49 cars in the drive-thru of a popular fast food restaurant revealed an average bill of$16.93 per car. The population standard deviation is$6.34. Estimate the mean bill for all cars from the drive-thru with93% confidence. Round intermediate and final answers to two decimal places.

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1b) Length of Growing SeasonsThe growing seasons for a random sample of44 U.S. cities were recorded, yielding a sample mean of193.6 days and the population standard deviation of55.6 days. Estimate the true population mean of the growing season with95% confidence. Round your answers to at least one decimal place.

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