Inference for Two-way Tables

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Presentation transcript:

Inference for Two-way Tables Section 13.2

Two parts for dealing with many comparisons Overall test Follow-up analysis

Expected Counts For a two-way table, the expected count is: (row total x column total)/ table total

Chi-Square Statistic Measure of how far the observed counts in a two-way table are from the expected counts

Chi-Square Test of Association/Independence Used to test null hypothesis when you have a two-way table from a single SRS with each individual classified according to both of two categorical variables

Practice Problems Section 13.2 Practice Chapter 13 Review pg. 766 #13.25-13.30 Chapter 13 Review pg. 770 #13.31-13.39