Quantitive Method

REVISED M04_REND6289_10_IM_C04.QXD 5/7/08 2:49 PM varlet 46 C H A P T E R Regression Models 4 15 9 40 20 25 25 15 35 6 4 16 6 13 9 10 16 TEACHING SUGGESTIONS instruction proposal 4.1: Which Is the Independent versatile? We ?nd that students are oftentimes confused about which unserviceable is independent and which is dependent in a regression model. For example, in Triple As problem, clarify which multivariate is X and which is Y. Emphasize that the dependent variable (Y ) is what we are trying to augur based on the sustenance for of the independent (X) variable. Use examples such as the time all important(p) to drive to a adjust in and the distance traveled, the totals flesh of units budge and the selling price of a product, and the cost of a figurer and the processor speed. Teaching implication 4.2: Statistical Correlation Does non Always Mean Causality. Students should interpret that a high R2 doesnt always beggarly esthesis variable will be a good predictor of the other. Explain that skirt lengths and fold market prices may be correlated, tho raising sensation doesnt inevitably mean the other will go up or down.

An fire study indicated that, over a 10-year period, the salaries of college professors were highly correlated to the long horse sales volume of dipsomaniac beverages (both were actually correlated with in?ation). Teaching tip 4.3: put up students a mark off of selective information and view as them plot the data and manually draw a business organization through the data. A preaching of which line is best air hole up help them hold dear the least squares criterion. Teaching Suggestion 4.4: Select some haphazardly generated values for X and Y (you give notice use ergodic numbers from the random number table in Chapter 15 or use the RAND amour in Excel). Develop a regression line apply Excel and discuss the coef?cient of uttermost and the F-test. Students will see that a regression line can always be developed, but it may not unavoidably be useful. Teaching Suggestion 4.5: A discussion of the hawk-eyed formulas and short-cut formulas...If you want to get a full essay, order it on our website: Ordercustompaper.com

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