WCU ECO 252 - ECO 252 Third Hour Exam (52 pages)

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ECO 252 Third Hour Exam



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ECO 252 Third Hour Exam

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Lecture Notes


Pages:
52
School:
West Chester University of Pennsylvania
Course:
Eco 252 - Quantitative Business Analysis II
Quantitative Business Analysis II Documents

Unformatted text preview:

252y0333TH 11 18 03 ECO252 QBA2 Third EXAM Nov 25 2003 TAKE HOME SECTION Name KEY Social Security Number Please Note computer problems 2 and 3 should be turned in with the exam In problem 2 the 2 way ANOVA table should be completed The three F tests should be done with a 5 significance level and you should note whether there was i a significant difference between drivers ii a significant difference between cars and iii significant interaction In problem 3 you should show on your third graph where the regression line is II Do the following 23 points Assume a 5 significance level Show your work 1 Assume that each column below represents a random sample of sales of the popular cereal brand Whee As it was moved from shelf 1 lowest to shelf 4 highest of a group of supermarkets Assume that the underlying distribution is Normal and test the hypothesis 1 2 3 4 a Before you start add the second to last digit of your social security number to the 451 in column 4 and find the sample variance of sales from shelf 4 For example Seymour Butz s SS number is 123456789 and he will change 451 to 459 This should not change the results by much 2 b Test the hypothesis 6 Show your work it is legitimate to check your results by running these problems on the computer but I expect to see hand computations for every part of them c Compare means two by two using any one appropriate statistical method to find out which shelves are significantly better than others 3 d Extra Credit What if you found out that each row represented one store If this changes your analysis redo the analysis 5 e Extra Credit What if you found out that each row represented one store and that the underlying distribution was not Normal If this changes your analysis redo the analysis 5 f I did some subsequent analysis on theis problem The output in part said Levene s Test any continuous distribution Test Statistic 0 609 P Value 0 613 What was I testing for and what should my conclusion be 2 Sales of Whee Cereal Shelf Row 1



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