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Suppose you want to buy a car and are trying to decide between two models. A friend suggests that perhaps the annual maintenance costs are

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Suppose you want to buy a car and are trying to decide between two models. A friend suggests that perhaps the annual maintenance costs are different for the two models. so you obtain random samples ofthe annual maintenance costs for 50 of each model of car. Assuming the population variances are unequal. a twomean hypothesis test would have howr many degrees of freedom? Provide your answer below: df=m

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