Exam 1 Review Inferences from 2 samples ANOVA Nonparametrics.

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Presentation transcript:

Exam 1 Review Inferences from 2 samples ANOVA Nonparametrics

Review 1

Model 1Model 2Model

Review 2 An analyst is looking at two portfolios of common stocks in terms of the average price- earnings ratio. He wishes to determine if there is a difference between the two portfolios. Portfolio 1Portfolio 2

Review 2

Review 3 A new SAT preparation program claims that students will improve their verbal scores with a practice test after one month on the program. To validate their claim, they recorded the starting and practice verbal SAT scores of 12 individuals after a one-month period.

Review 3 Starting SAT ScorePractice SAT Score Use an alpha of.05 What is the appropriate test? What is: The null hypothesis The alternative hypothesis The conclusion SAT data set is online

Review 4 From the top 1000 companies in valuation, a comparison of the mean dividend yield of the top and bottom ten electric utility companies is desired. The data shown below are for two independent samples, which are drawn at random from populations that are normally distributed.

Review 4 Also in data set as Electric_practice Top TenBottom Ten Alpha =.05 Null hypothesis Alternative hypothesis Conclusion