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As we are testing here whether the hotel stays are cheaper in Phoenix, the test statistic here is computed as:
As the test statistic value here is very low, therefore the p-value here would be approximately equal to 0 and therefore the test is significant and we can reject the null hypothesis here and conclude that we have sufficient evidence that the hotel stays are cheaper in phoenix.
p-value is close to 0 < 0.01 which is the level of significance.