AP Statistics

Unit 8: Inference for Categorical Data: Chi-Square

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AP Statistics

Unit 8: Inference for Categorical Data: Chi-Square

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Chi-square tests for goodness of fit, homogeneity and independence.

Key formula

\chi^2 = \sum \frac{(O - E)^2}{E}

What this unit covers

Goodness of fit
Homogeneity
Independence
Expected counts and conditions

Other units in AP Statistics

Unit 1: Exploring One-Variable Data
Unit 2: Exploring Two-Variable Data
Unit 3: Collecting Data
Unit 4: Probability, Random Variables, and Probability Distributions
Unit 5: Sampling Distributions
Unit 6: Inference for Categorical Data: Proportions
Unit 7: Inference for Quantitative Data: Means
Unit 9: Inference for Quantitative Data: Slopes