Chapter 5: How Variables Classify Jointly: Contingency Tables.

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Presentation transcript:

Chapter 5: How Variables Classify Jointly: Contingency Tables

Binomial / Bernoulli Distribution

Binomial Formula

Excel Binomial Distribution

Cell Phone Quality Control Your company will be satisfied if only 1% of its phones fail to establish a connection with a cell tower that’s within reach. GoalSamplePrediction ? 1%4%? 102?

Understanding One-Way Pivot Tables

Using the BINOM.DIST() Function

Understanding Two-Way Pivot Tables

Cross-Tabulation Predictor Variables Outcome Variables Significance Testing gender income race hispanic education age employment parent Demographics Predictors: Mostly Categorical Continuous Categorical Party ID census region

Z-Test Proportions A chi-square test for equality of two proportions is exactly the same thing as a z -test.

Chi-Square vs. Z-Test Proporations

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