You may need to use the appropriate appendix table or technology to answer this question. DATAfile: ResidentialWater On its municipal website, the city of Tulsa states that the rate it charges per 5...


You may need to use the appropriate appendix table or technology to answer this question.

DATAfile: ResidentialWater

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.


























































10.489.1811.86.512.4214.5315.56
10.1214.516.1817.619.1817.9812.85
16.817.3515.6414.818.9117.9914.9
18.4216.0526.8522.3222.7620.9823.45
19.0523.719.2623.7527.827.0527.14
26.9924.6837.8626.5139.0129.4641.65


(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.)


H0:





Ha:









(b)


What is the test statistic for your hypothesis test in part (a)? (Round your answer to three decimal places.)


What is thep-value for your hypothesis test in part (a)? (Round your answer to four decimal places.)



Repeat the preceding hypothesis test using the critical value approach.

State the null and alternative hypotheses. (Enter != for ≠ as needed.)


H0:





Ha:






Find the value of the test statistic. (Round your answer to three decimal places.)


State the critical values for the rejection rule. Use
? = 0.05.

(Round your answers to three decimal places. If the test is one-tailed, enter NONE for the unused tail.)

test statistic≤test statistic≥



Jun 05, 2022
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