To test the hypotheses: Ho: M1 = 2 versus Ha: M1 M2 where is the mean number of miles driven per person each day with population 1 = Phoenix and 2 = Tucson, A researcher rejects the null at the 5% level of significance and concludes that there is enough evidence of a difference in the mean number of miles driven per person each day for these two cities. The 95% confidence interval for 1-2 is (9.873, 18.001). Briefly explain how the confidence interval supports the decision to reject the null hypothesis.

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