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Problem 2.! 3013s, 10 pts each part} Operators of gasoline-meled vehicles complain about the price of gasoline in gas stations. According to the American Petroleum Institute, the federal gas tax per gallon is constant (18.4515 as of January 13, 2005), but state and local taxes vary from 75 to 32.10 for n = 18 key metropolitan areas around the country. The total tax per gallon for gasoline at each of these 18 locations is given next. Suppose that these measurements constitute a random sample of size 18: 42.39 53.9! 48.55 47.90 47.73 46.61 40.45 39.65 38.65 37.95 36.80 35.95 35.09 35.04 34.95 33.45 28.99 27.45 a) Is there sufcient evidence to claim that the average per gallon gas tax is less than 45 at alfa=.05? b) Find the p-value associated with the test. c) Construct a 95% condence interval for the average per gallon gas tax in the United States