CENGAGE | MINDTAP Q Search this Chapter 9 Assignment Questions Exercise 09.01 (Developing Null and Alternative Hypotheses) Question 1 of 10 Check My Work (5 remaining) The manager of the Danvers-Hilton Resort Hotel stated that the mean guest bill for a weekend is $600 or less. A member of the hotel's accounting staff noticed that the total charges for guest bills have been increasing in recent months. The accountant will use a sample of future weekend guest bills to test the manager's claim. a. Which form of the hypotheses should be used to test the manager's claim? 6. Ho: H - Select your answer - Ha: H - Select your answer 1. O b. When Ho cannot be rejected, can we conclude that the manager's claim is wrong? - Select your answer - 9. O c. When Ho can be rejected, can we conclude that the manager's claim is wrong? - Select your answer - 10. Check My Work (5 remaining) O- Icon Keye.com wow/wi/evo/index.html?deploymentld:59914023676212817384117008860815BN- 97803571314668d 15325983850snapshould-31059 40 5 CENGAGE | MINDTAP Q Search this cours Chapter 9 Assignment Assignment: Chapter 9 Assignment Assignment Score: 0.00% ave Submit Assignment for Grading Questions Exercise 09.03 (Developing Null and Alternative Hypotheses) Question 2 of 10 1. Check My Work (5 remaining) A production line operation is designed to fill cartons with laundry detergent to a mean weight of 32 ounces. A sample of cartons is periodically selected and weighed to determine whether underfilling or overfilling is occurring. If the sample data lead to a conclusion of underfilling or overfilling, the production line will be shut down and adjusted to obtain proper filling. a. Formulate the null and alternative hypotheses that will help in deciding whether to shut down and adjust the production line. Ho: H - Select your answer H.: H - Select your answer b. Comment on the conclusion when Ho cannot be rejected. Is there evidence that the production line is not operating properly? 8. - Select your answer - 9. O c. Comment on the conclusion when Ho can be rejected. Can we conclude that overfilling or underfilling exists? - Select your answer - Check My Work (5 remaining) 10:4 9/26X MindTap - Cengage Learning X e.com CENGAGE |MINDTAP Q Search this Chapter 9 Assignment Questions Exercise 09.07 (Type | and Type II Errors) Question 3 of 10 1. Check My Work (5 remaining) Carpetland salespersons average $8000 per week in sales. Steve Contois, the firm's vice president, proposes a compensation plan with new selling incentives. Steve hopes that the results of a trial selling period will enable him to conclude that the compensation plan increases the average sales per salesperson. 5. a. Develop the appropriate null and alternative hypotheses. b. Ho: H - Select your answer - H.: H - Select your answer - b. What is the Type I error in this situations In this situation, a Type I error would occur if it was concluded that the new compensation plan provides a population mean weekly sales 9 - Select your answer - v when in fact it does not. 10. O What are the consequences of making this error? - Select your answer - c. What is the Type II error in this situation? In this situation, a Type II error would occur if it was concluded that the new compensation plan provides a population mean weekly sales - Select your answer - when in fact it does not. What are the consequences of making this error? - Select your answer - Check My Work (5 remaining)MindTap - Cengage Learning .com # O CENGAGE | MINDTAP Q Search this course Chapter 9 Assignment Save Submit Assignment for Grading Questions Exercise 09.13 (Population Mean: Sigma Known) Question 4 of 10 > 2. Check My Work (5 remaining) Consider the following hypothesis test: Ho : 1 5 50 5. O H. : ( > 50 O A sample of 60 is used and the population standard deviation is 8. Use the critical value approach to state your conclusion for each of the O following sample results. Use a = 0. 05. O Note: In the following questions, if the correct option is "Reject Ho" select "option 1" . If "Do not reject Ho" is correct, then select "option 2". a. I = 52.5 10. O - Select your answer - b. 2- 51 - Select your answer - C. C = 51. 8 - Select your answer - Check My Work (5 remaining) O- Icon Key 10:43 9/26/X MindTap - Cengage Learning ngage.com CENGAGE | MINDTAP Q, Sear Chapter 9 Assignment 5. O TextRequest reports that adults 18 - 24 years old send and receive 128 texts every day. Suppose we take a sample of 25 - 34 year olds their mean number of daily texts differs from the mean for 18 - 24 year olds reported by TextRequest. Tools O a. Select the null hypothesis we should use to test whether the population mean daily number of texts for 25 - 34 year olds differs from th O population daily mean number of texts for 18 - 24 year olds. 1. Ho: / = 128 2. Ho: H # 128 10. O 3. Ho: / > 128 - Select your answer - Select the alternative hypothesis we should use to test whether the population mean daily number of texts for 25 - 34 year olds differs from population daily mean number of texts for 18 - 24 year olds. 1. He: u # 128 2. He : 1 = 128 3. H.: u > 128 - Select your answer - b. Suppose a sample of thirty 25 - 34 year olds showed a sample mean of 118.6 texts per day. Assume a population standard deviation of 33 texts per day and compute the p-value. Round your answer to four decimal places. c. With a - 0.05 as the level of significance, what is your conclusion? - Select your answer - v |Ho. We - Select your answer - v conclude that the population mean daily texts for 25 - 34 year olds differs significantly from the population mean of 128 daily texts for 18 - 24 year olds. d. Repeat the preceding hypothesis test using the critical value approach.MindTap - Cengage Learning m CENGAGE | MINDTAP Q Search th Chapter 9 Assignment - Select your answer - b. Suppose a sample of thirty 25 - 34 year olds showed a sample mean of 118.6 texts per day. Assume a population standard deviation of 33.1 texts per day and compute the p-value. Round your answer to four decimal places. c. With a = 0.05 as the level of significance, what is your conclusion? - Select your answer - v | Ho. We - Select your answer - v conclude that the population mean daily texts for 25 - 34 year olds differs significantly from the population mean of 128 daily texts for 18 - 24 year olds. d. Repeat the preceding hypothesis test using the critical value approach. The critical value(s) is(are) - Select your answer - v Can it be concluded that the population mean differs from 1287 - Select your answer - Check My Work (5 remaining) O- Icon Key Question 5 of 10 Exercise 09.17 (Population Mean: Sigma Known) Save Submit Assignment for Grading-97803571314668ud=1582598 NGAGE | MINDTAP Q Search this course er 9 Assignment ssignment: Chapter 9 Assignment Assignment Score: 0.00% Save Submit Assignment for Grading uestions Exercise 09.19 (Population Mean: Sigma Known) Question 6 of 10 Check My Work (5 remaining) O According to the IRS, taxpayers calling the IRS in 2017 waited 13 minutes on average for an IRS telephone assister to answer. Do callers who use the IRS help line early in the day have a shorter wait? Suppose a sample of 50 callers who placed their calls to the IRS in the first 30 minutes that the line is open during the day have a mean waiting time of 11 minutes before an IRS telephone assister answers. Based on data from past years, you decide that it is reasonable to assume that the standard deviation of waiting times is 8 minutes. Using these sample results, can you conclude that the waiting time for calls placed during the first 30 minutes the IRS help line is open each day is significantly less than the overall mean waiting time of 13 minutes? Use a = 0.05. State the hypotheses. Ho: / - Select your answer - Ha : /4 - Select your answer - What is the p-value (to 4 decimals)? Can you conclude that callers who use the IRS help-line early in the day have a shorter wait? - Select your answer - Check My Work (5 remaining) 10:44 9/26/ Oing .com wi/evo/index.him!?deploymentld: 599140236762128178411 /0088608ISBN 9/8035/1314668id -158 CENGAGE MINDTAP Q s Chapter 9 Assignment Check My Work (5 rem O Consider the following hypothesis test: Ho: AS 12 O Hail > 12 A sample of 25 provided a sample mean a = 14 and a sample standard deviation s = 4.32. 10 O a. Compute the value of the test statistic (to 2 decimals). b. Use the t distribution table (Table 2 in Appendix B) to compute a range for the p-value. The p-value is - Select your answer C. At a = 0.05, what is your conclusion? - Select your answer - d. What is the rejection rule using the critical value? (Use a = 0.05.) Reject Ho if t is - Select your answer - > the critical value of (to 3 decimals). Can you conclude that the population mean is greater than 12? - Select your answer - Check My Work (5 rema O- Icon KeyMindTap - Cengage Learning X + CENGAGE | MINDTAP Q Search this c Chapter 9 Assignment 7. 8. O 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 9 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. 10. O Click on the datafile logo to reference the data. DATA file 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. Choose the correct null hypothesis: 1. Ho: / = 21.62 2. Ho: / # 21.62 3. Ho: p