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(Solved): Cost of Residential Water. On its municipal website, the city of Tulsa states that the rate it charg ...
Cost of Residential Water. On its municipal website, the city of Tulsa states that
the rate it charges per 5 centum cubic feet (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. LO 1, 2, 5
DATA file
ResidentialWater
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.
b. What is the p-value for your hypothesis test in part (a)?
c. At \alpha =0.05, can your null hypothesis be rejected? What is your
conclusion?
d. Repeat the preceding hypothesis test using the critical value approach.