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according to the national automobile dealers association the average cost of a car in 2014 was 28400 this was 1600 less than six times the cost in 1975 what was the average cost of the car i 69181

According to the National Automobile Dealers Association, the mean price for used cars is 10,192 . A manager of a Kansas City used car dealership reviewed a sample of 50 recent used car sales at the dealership in an attempt to determine whether the population mean price for used cars at this particular dealership differed from the national mean. The prices for the sample of 50 cars are shown in the file named UsedCars. a. Fomulate the hypotheses that can be used to determine whether a differenc