lenovo 191/cfi/4741/4/4@0.00:57.6 Co At a = .05, what is your conclusion? d. Repeat the preceding hypothesis test using the critical value approach. 28. CEO Tenure. A shareholders' group, in lodging a protest, claimed that the mean ten- ure for a chief executive office (CEO) was at least nine years. A survey of companies reported in The Wall Street Journal found a sample mean tenure of x = 7.27 years for CEOS with a standard deviation of s = 6.38 years. a. Formulate hypotheses that can be used to challenge the validity of the claim made by the shareholders' group. b. Assume 85 companies were included in the sample. What is the p-value for hypothesis test? c. At a .01, what is your conclusion? 29. Cost of Residential Water. On its municipal website, the city of Tulsa states that the your 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 COCF 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 d. Repeat the preceding hypothesis test using the critical value approach. 30. Time in Child Care. The time married men with children spend on child care averages 6.4 hours per week. You belong to a professional group on family practices your conclusion? We've updated our read aloud feature! Give it a try here. s Reserved. May not be copied, scanned. or duplicated. in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and ontent does not materially affect the overall learning experience. Cengage Learning reserves the right to remove additional content at any time if subsequent rights age Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. WCN 02-200-202 Aa 12:37 PM 10/29/201 e 1- il LTE 12:37 bartleby.com Ebartleby cnargea by 2. What is the Math/Statistics / Q&A Lib... part (a)? 3. At a .05, c What is you 5) Cost of Residential Water. O 4. Repeat the preceding hypothesis test using the critical value approach. Rate (5 CCF) Public Utility Company $10.48 Orlando Utilities Commission $9.18 Memphis Light, Gas and Water $11.80 Central Arkansas Water City of Phoenix Water System $6.50 City of Lincoln Water System $12.42 San Antonio Water System $14.53 $15.56 Salt Lake City Public Utilities $10.12 Nashville Metro Water Services City of Dover Water System $14.50 $16.18 Lakeland Electric $17.60 Huntsville Utilities $19.18 Omaha Metropolitan Utilities District Jacksonville Electric Authority $17.98 City of Dallas Water System $12.85 $16.80 City of St. Louis Water System Charleston Water System $17.35 City of Clewiston Water System $15.64 Springfield (IL) City Water, Light and $14.80 Power $18.91 City Of Milwaukee Water System $17.99 Detroit Sewerage and Water Department $14.90 City of Charlotte Water System Louisville Water Company $18.42 City of Jackson (MS) Water System $16.05 $26.85 Las Vegas Valley Water District City of Columbus OH Water System $22.32 City of Oklahoma City - Utilities $22.76 Jackson TN Energy Authority $20.98 $23.45 Knoxville Utilities Board $19.05 New York City Water Board $23.70 Reno Truckee Meadows Water Authority $19.26 Chattanooga American Water Company Marietta Board of Lights & Water $23.75 $27.80 City Utilities of Springfield MO $27.05 Indianapolis Citizens Energy Group $27.14 City of Philadelphia Water System LA Sewerage and Water Board of New $26.99 Orleans $24.68 Boston Water and Sewer Commission $37.86 Birmingham Water Works $26.51 Austin Water City of Bellevue Water System $39.01 $29.46 City of Los Angeles Water System $41.65 Peoria American Water Ancwor