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CengageBrain - Login or R MindTap-Cengage Learn × Cengage Learning C ng.cengage.com/static/nb/ui/index.html?nbld-251088&nbNodeld-79100273;&deploymentld-4750011632736883562; 1 1 58382&eISBN-978128551; 1078#!&parentld-9222809; Jason Scott HW 8 Du 8 AM EDT 98 ining: 1:11:52 Save Submit Assignment for Grading Questions InterpretingResults.08.01 Question 9 of 12 Check My Work (No more tries available) 2. Case Problem: Young Professional Magazine Young Professional magazine was developed for a target audience of recent college graduates who are in their first 10 years of a business or other professional career. The magazine has been fairly successful and the publisher is interested in expanding the publication's advertising base. As a recent hire into the marketing department at the magazine, you have been asked to help develop a survey asking readers demographic information and questions about their interests. Your survey results will be used to help the magazine choose articles of interest and provide advertisers with a profile of subscribers. The culmination of your work will be a presentation of your findings to management. Therefore, you not only have to present summary data, but must also be able to explain the results in a manner that is accurate and easy to understand. After running your analysis, the software returns the following information about the age of the respndents: 4 6. 7. 8 Variable N Age 95% CI 29.7215 to 30.5029 Mean StDev SE Mean 10 11, o 12. 410 30.1122 4.0240 0.1987 which statement should you use to explain the 95% confidence interval to management? O a. There is a 95% probability that the population mean age of all respondents lies within the interval 29.7215 to 30.5029 O b. we are 95% confident that the interval 29.7215 to 30.5029 includes the sample mean age of all respondents c, we are 95% confident that the interval 29.7215 to 30.5029 includes the population mean age of all respondents. d, we are confident that 95% of our readers have ages between 29.7215 to 30.5029. LUVO O Check My Work (No more tries available) 010096 Correct O Partially Correct . Visited, Not YetJudged @Incorrect Needs lnstructor Grading S Not lntended for Grading InterpretingResults.08.01 Question 9 of 12 Save Submit Assignment for Grading 9:17 PM 3/17/2016 Search the web and Windows

Explanation / Answer

For a 95% confidence interval for th population mean,

OPTION C: We are 95% confident that the interval 29.7215 to 30.5029 includes the population mean age of all respondents. [ANSWER]

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We cannot attach a probability that the population mean is inside the confidence interval, as in A. The population mean is only either inside or outside the interval.

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