Dr. Dow Jones wants to know whether a problem-based approach to teaching economics will result in higher academic performance than his traditional method. Of the six sections of Economics 101 at his university, Dr. Jones randomly assigns three sections to the traditional method and three sections to the problem-based method for Unit 1 of the course. Then all sections switch instructional method for Unit 2. He plans to compare the performance of the two groups of sections on their Unit 1 and Unit 2 exams. This study employs a ______ design.
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Jones is comparing two different teaching methods (traditional and problem-based) to see their effect on academic performance. He randomly assigns three sections to each method for Unit 1 and then switches the methods for Unit 2. This means that each section Show more…
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Dr. Dow Jones wants to know whether a problem-based approach to teaching economics will result in higher academic performance than his traditional method. Of the six sections of Economics 101 at his university, Dr. Jones randomly assigns three sections to the traditional method and three sections to the problem-based method. At the end of semester all students complete the same final exam. In this design, students studying under the problem-based method constitute the:
Emily H.
Professor Jones has just been hired by the economics department at a major university. The president of the board of regents has stated that the university is committed to providing top-quality education for undergraduates. Two months into the semester, Jones fails to show up for his classes. It seems he is devoting all his time to research rather than to teaching. Jones argues that his research will bring prestige to the department and the university. Should he be allowed to continue exclusively with research? Discuss with reference to the principal-agent problem.
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The Dow Jones Industrial Average (DJIA) and the Standard \& Poor's 500 Index (S\&P 500$)$ . are both used to measure the performance of the stock market. The DJIA is based on the price of stocks for 30 large companies; the S\&P 500 is based on the price of stocks for 5000 companies. If both the DJIA and S\&P 500 measure the performance of the stock market, how are they correlated? The following data show the daily percent increase or daily percent decrease in the DJIA and S\&P 500 for a sample of nine days over a three-month period (The Wall Street Journal, January 15 to March $10,2006 )$ a. Show a scatter diagram. b. Compute the sample correlation coefficient for these data. c. Discuss the association between the DJIA and S\&P 500. Do you need to check both before having a general idea about the daily stock market performance?
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