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You want to test whether the mean house price in Davis and Sacramento are different. You have a sample of 100 house prices in Davis

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You want to test whether the mean house price in Davis and Sacramento are different. You have a sample of 100 house prices in Davis and 120 house prices in Sacramento. You want to do a hypothesis test. How many degrees of freedom should you use? A. 100 B. 120 C. 220 D. 219 E. 218 F. None of the above

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