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Public Utility Company Rate (5 CCF) Orlando Utilities Commission $10.48 Memphis Light, Gas and Water $9.18...

Public Utility Company Rate (5 CCF)
Orlando Utilities Commission $10.48
Memphis Light, Gas and Water $9.18
Central Arkansas Water $11.80
City of Phoenix Water System $6.50
City of Lincoln Water System $12.42
San Antonio Water System $14.53
Salt Lake City Public Utilities $15.56
Nashville Metro Water Services $10.12
City of Dover Water System $14.50
Lakeland Electric $16.18
Huntsville Utilities $17.60
Omaha Metropolitan Utilities District $19.18
Jacksonville Electric Authority $17.98
City of Dallas Water System $12.85
City of St. Louis Water System $16.80
Charleston Water System $17.35
City of Clewiston Water System $15.64
Springfield (IL) City Water, Light and Power $14.80
City Of Milwaukee Water System $18.91
Detroit Sewerage and Water Department $17.99
City of Charlotte Water System $14.90
Louisville Water Company $18.42
City of Jackson (MS) Water System $16.05
Las Vegas Valley Water District $26.85
City of Columbus OH Water System $22.32
City of Oklahoma City - Utilities $22.76
Jackson TN Energy Authority $20.98
Knoxville Utilities Board $23.45
New York City Water Board $19.05
Reno Truckee Meadows Water Authority $23.70
Chattanooga American Water Company $19.26
Marietta Board of Lights & Water $23.75
City Utilities of Springfield MO $27.80
Indianapolis Citizens Energy Group $27.05
City of Philadelphia Water System $27.14
LA Sewerage and Water Board of New Orleans $26.99
Boston Water and Sewer Commission $24.68
Birmingham Water Works $37.86
Austin Water $26.51
City of Bellevue Water System $39.01
City of Los Angeles Water System $29.46
Peoria American Water $41.65

Cost of Residential Water. 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.

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 a = .05, can your null hypothesis be rejected? What is your conclusion?

d. Repeat the preceding hypothesis test using the critical value approach

Solutions

Expert Solution

milcah answered 2 years ago
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