<skill_content>
<overview> Descriptive statistics are the foundation of all statistical analysis. They reveal data structure, quality issues, and patterns that inform subsequent modeling choices. ALWAYS start with descriptive statistics before any inferential or causal analysis.This skill ensures you understand your data thoroughly before making statistical claims. </overview>
<mandatory_requirements>
<requirement priority="critical"> <name>Complete Summary Statistics</name> <descriptio[Description truncada. Veja o README completo no GitHub.]