"Given are the set of ages of 9 middle-management employees of a certain company: 53, 45, 59, 48, 54, 46, 51, 58, and 55. Compute for the standard deviation." O 52.11 25.11 5.01 53

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An airline claims at the Average number of years of experience of its pilots is 18.3 years. In a study 20 pilots the average number of experience is 17.4. The standard deviation of the sample is 3. At a=0.10 is the number of years experience of the pilots really what the airline claimed? State the P- value and the decision. (reject or do not reject)

2.38 Baggage fees: An airline charges the following baggage fees: $30 for the first bag and $40 for the second. Suppose 45% of passengers have no checked luggage, 28% have only one piece of checked luggage and 27% have two pieces. We suppose a negligible portion of people check more than two bags. a) The average baggage-related revenue per passenger is: $ |(please round to the nearest cent) b) The standard deviation of baggage-related revenue is: $ (please round to the nearest cent) C) About how much revenue should the airline expect for a flight of 100 passengers? $ (please round to the nearest dollar)

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3. The U.S. Department of Agriculture claims that the mean consumption of bottled water by a person in the United States is 28.5 gallons per year. A random sample of 100 people in the United States has a mean bottled water consumption of 27.8 gallons per year with a standard deviation of 4.1 gallons. At a = 0.08, can you reject the claim? (Adapted from U.S. Department of Agriculture) 201-0