10.23 In tough economic times, the business staff at magazines are challenged to sell advertising space in their publications. Thus, one indicator of a weak economy is the decline in the number of “ad pages” that magazines have sold. The file contains the number of ad pages found in the May 2008 and May 2009 issues of 12 men’s magazines. (Data extracted from W. Levith, “Magazine Monitor,” Mediaweek, April 20, 2009, p. 53.) a. At the 0.05 level of significance, is there evidence that the mean number of ad pages was higher in May 2008 than in May 2009? b. What assumption is necessary about the population distribution in order to perform this test? c. Use a graphical method to evaluate the validity of the assumption in (b). d. Construct and interpret a 95% confidence interval estimate of the difference in the mean number of ad pages in men’s magazines between May 2008 and May 2009.
Magazine 2008 2009 Details 72.31 48.42 Esquire 66.69 42.79 Field & Stream 48.65 42.82 Flex 219.61 231.58 GQ 99.21 60.35 Maxim 68.5 41.82 Men’s Fitness 99.43 67.63 Men’s Health 90.88 74.45 Men’s Journal 183.1 88.34 Mucscle & Fitness 169.63 198.93 Outdoor Life 41.39 30.16 Outside 126.97 103.58
We value our customers and so we ensure that what we do is 100% original..
With us you are guaranteed of quality work done by our qualified experts.Your information and everything that you do with us is kept completely confidential.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.
Read moreThe Product ordered is guaranteed to be original. Orders are checked by the most advanced anti-plagiarism software in the market to assure that the Product is 100% original. The Company has a zero tolerance policy for plagiarism.
Read moreThe Free Revision policy is a courtesy service that the Company provides to help ensure Customer’s total satisfaction with the completed Order. To receive free revision the Company requires that the Customer provide the request within fourteen (14) days from the first completion date and within a period of thirty (30) days for dissertations.
Read moreThe Company is committed to protect the privacy of the Customer and it will never resell or share any of Customer’s personal information, including credit card data, with any third party. All the online transactions are processed through the secure and reliable online payment systems.
Read moreBy placing an order with us, you agree to the service we provide. We will endear to do all that it takes to deliver a comprehensive paper as per your requirements. We also count on your cooperation to ensure that we deliver on this mandate.
Read more