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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.

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.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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i NEED STEP BY STEP SOLUTION OF ALL PARTS OF QUESTION 29.

 

 

Sample Mean= $20.24

Sample Standard Deviation= 7.80

9.4 Population Mean: r Unknown 443 (F 25. Consider the following hypothesis test: HiH< 45 A sample of 36 is used. Identify the p-value and state your conclusion for each of the 01. following sample results, Use a = 5.2 44 and s b. = 43 and s 4.6 C. N 46 and s = 5.0 26. Consider the following hypothesis test: 100 Hiµ # 100 a A sample of 65 is used. Identify the p-value and state your conclusion for each of the following sample results. Use a .05. a. x 103 and s = 11.5 %3D b. = 96.5 and s = 11.0 c. X = 102 and s 10.5 Applications 27. Price of Good Red Wine. According to the Vivino website, the mean price for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is $32.48. A New England-based lifestyle magazine wants to determine if red wines of the same quality are less expensive in Providence, and it has collected prices for 56 randomly selected red wines of similar quality from wine stores throughout Providence. The mean and standard deviation for this sample are $30.15 and $12, respectively. a. Develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean price in Providence for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is less than the population mean of $32.48. b. Using the sample from the 56 bottles, what is the p-value? c. 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 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 your 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 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 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 6.38 уears. DATA file ResidentialWater your conclusion? DATA file ChildCare
Transcribed Image Text:9.4 Population Mean: r Unknown 443 (F 25. Consider the following hypothesis test: HiH< 45 A sample of 36 is used. Identify the p-value and state your conclusion for each of the 01. following sample results, Use a = 5.2 44 and s b. = 43 and s 4.6 C. N 46 and s = 5.0 26. Consider the following hypothesis test: 100 Hiµ # 100 a A sample of 65 is used. Identify the p-value and state your conclusion for each of the following sample results. Use a .05. a. x 103 and s = 11.5 %3D b. = 96.5 and s = 11.0 c. X = 102 and s 10.5 Applications 27. Price of Good Red Wine. According to the Vivino website, the mean price for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is $32.48. A New England-based lifestyle magazine wants to determine if red wines of the same quality are less expensive in Providence, and it has collected prices for 56 randomly selected red wines of similar quality from wine stores throughout Providence. The mean and standard deviation for this sample are $30.15 and $12, respectively. a. Develop appropriate hypotheses for a test to determine whether the sample data support the conclusion that the mean price in Providence for a bottle of red wine that scores 4.0 or higher on the Vivino Rating System is less than the population mean of $32.48. b. Using the sample from the 56 bottles, what is the p-value? c. 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 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 your 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 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 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 6.38 уears. DATA file ResidentialWater your conclusion? DATA file ChildCare
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