QUESTION 6 Expedia would like to test the hypothesis that the average roundtrip airfare between Philadelphia and Paris is higher for a flight originating in Philadelphia when compared to a flight originating in Paris. The following data summarizes the sample statistics for roundtrip flights originating in both cities. Assume that the population variances are equal. If Population 1 is defined as flights originating in Philadelphia and Population 2 is defined as flights originating in Paris, using a = 0.05, what is the critical value for this hypothesis test? Originating City Sample mean Sample size Sample standard deviation Philadelphia $1,240 15 $270 Paris $1,060 19 $240

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