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Lecture27_HH_PPTX

# Lecture27_HH_PPTX - COMM 291 Applications of Statistics in...

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Click to edit Master subtitle style 5/10/10 Lecture 27 Section 201 M/W/F 10:00-11:00 COMM 291 Applications of Statistics in 1 1

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5/10/10 The Chi-Square Test for Homogeneity 2 2
5/10/10 The Chi-Square Test for Homogeneity Convert the results to “column percentages”: Response patterns are beginning to become apparent. 3 3

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5/10/10 The Chi-Square Test for Homogeneity 4 4 Use the Row % column to determine the expected counts for each table column (each country):
5/10/10 The Chi-Square Test for Homogeneity 5 5 Following the pattern of the goodness-of-fit test, compute the component for each cell: ( 29 2 Component Obs Exp Exp - = Then, sum the components: ( 29 2 2 all cells Obs Exp Exp χ - = The degrees of freedom are (The for the appearance survey indicates that the differences between countries are not due to random chance.) 2 χ

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5/10/10 Assumptions and Conditions Check the Counted Data Condition (Section 15.1) Check the Randomization Condition Check the Expected Cell Frequency Condition (Section 15.1) 6 6
5/10/10

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Lecture27_HH_PPTX - COMM 291 Applications of Statistics in...

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