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From a sample of 100 stores in your area you have found that the mean price of a gallon of milk is $3.16. The mean
From a sample of 100 stores in your area you have found that the mean price of a gallon of milk is $3.16. The mean nationally is $3.21 with a standard deviation of $0.19. If yoy wanted to determine if the price of milk was typically lower in your area or if your particular sample just so happens to have a lower mean than the national mean by chance which would be the most appropriate null and research hypotheses
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