On its municipal website, the city of Tulsa states that the rate it charges per 5 CCF of residential water is $21.62. How do the residential water rates of other U.S. public utilities compare to Tulsa’s rate? The file ResidentialWater contains the rate per 5 CCF of residential water for 42 randomly selected U.S. cities. Using the critical value approach, conduct the appropriate hypotheses to determine whether the population mean rate per 5 CCF of residential water charged by U.S. public utilities differs from the $21.62 rate charged by Tulsa. Use α = 0.05. Critical Value Approach Develop the null and alternative hypothesis Specify the level of significance, α Choose the test statistic (z or t) Use the level of significance to determine the critical value and the rejection rule Calculate the test statistic Compare test statistic to your rejection rule. Reject of Fail to Reject the null hypothesis Interpret the statistical conclusion in the context of the problem

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