On its municipal website, the city of Tulsa states that the rate it charges per 5 CCF of residential water is $21.62. How do the residential water rates of other U.S. public utilities compare to Tulsa's rate? The data shown below ($) contains the rate per 5 CCF of residential water for 42 randomly selected U.S. cities. 10.38 9.08 I 11.7 6.4 12.32 14.43 15.46 10.02 14.4 16.08 17.5 19.08 17.88 12.75 16.7 17.25 15.54 14.7 18.81 17.89 14.8 18.95 23.6 18.32 15.95'26.75 22.22 22.66 20.88 23.35 l19.16 23.65 27.7 26.95 27.04 26.89 24.58'37.76 26.41 38.91 29.36 41.55 (a) Formulate hypotheses that can be used 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. (Enter != for as needed.) Ho: x Ha: x (b) what is the test statistic for your hypothesis test in part (a)? (Round your answer to three decimal places.) X (c) At a = 0.05, can your null hypothesis be rejected? What is your conclusion? Reject Ho. The mean rate per 5 CCF of residential water throughout the United States does not differ significantly from the rate per 5 CCF of residential water in Tulsa. Do not reject Ho. The mean rate per 5 CCF of residential water throughout the United States does not differ significantly from the rate per 5 CCF of residential water in Tulsa. Do not reject Ho. The mean rate per 5 CCF of residential water throughout the United States differs significantly from the rate per 5 CCF of residential water in Tulsa. O Reject Ho. The mean rate per 5 CCF of residential water throughout the United States differs significantly from the rate per 5 CCF of residential water in Tulsa. (d) Repeat the preceding hypothesis test using the critical value approach. State the null and alternative hypotheses. (Enter != for # as needed.) Ho: X X Find the value of the test statistic. (Round your answer to three decimal places.) -1.231 State the critical values for the rejection rule. Use a = 0.05. (Round your answers to three decimal places. If the test is one-tailed, enter NONE for the unused tail.) test statistic S -2.020 test statistic 2 2.020