35 multiple-choice questions in College Board exam style. Each has four choices and a full explanation of why each option is right or wrong.
Identify the variable type first. Categorical vs. quantitative decides which display and statistics are valid.
Let shape choose your statistics. Skewed data or outliers → median and IQR; roughly symmetric → mean and standard deviation.
Separate sampling from assignment. Random sampling supports generalizing; random assignment supports cause and effect.
Answer in context, and read the explanations even when you got it right.