Statistical Methods Examples

Math 222 - Spring 2026

• Examples
• Main
• Notes
• Tools

Graphics

• Basic plots with R
• Fancier plots with ggplot2
• Quantile-quantile plots

Inference with R

• Confidence intervals for proportions (Rmd, html)
• Inference for two proportions (source)
• Chi-squared test for association
• Chi-squared test for goodness of fit
• Two sample t-test
• Log transform of quantitative data
• One-way ANOVA
• ANOVA: Pairwise Comparisons