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1.) Below are MPGs of certain cars, taken in 2017 and then again in 2022. At oc= 0.05, can the car manufacturers claim that the

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1.) Below are MPGs of certain cars, taken in 2017 and then again in 2022. At oc= 0.05, can the car manufacturers claim that the mean difference is greater than zero? Did the manufacturers a.) Test using a hypothesis test b.) Construct an appropriate confidence interval

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