Statistics (STAT 101) Chi-Square Tests (Goodness-of-Fit & Independence) Practice Problems
University of California, San Diego
Statistics (STAT 101) | Practice Problems

Overview
A high-intent practice packet for chi-square tests that focuses on the exact table setups and interpretation steps students forget during exams.

Key topics
•goodness-of-fit vs independence
•expected counts calculation
•degrees of freedom rules
•p-value interpretation in context

Suggested study tasks
•set up a contingency table and compute expected counts
•run one goodness-of-fit test end-to-end
•write a conclusion sentence for two scenarios

Common pitfalls
•using chi-square with small expected counts
•mixing up degrees of freedom formulas
•interpreting p-value as probability the null is true