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Suppose that the national average price for used cars is $10,192. A manager of a local...

Suppose that the national average price for used cars is $10,192. A manager of a local used car dealership is interested in determining whether the population mean price for the used cars at this dealership is less than the national mean. A review of a sample of 36 recent used car sales resulted in a mean of $9,750 with a standard deviation of $1400. Test at the 5% level of significance.

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