Inference, estimation, and decision-making from data
So far each variable stood alone. The real questions usually involve two variables at once: does study time relate to grades? does model size relate to accuracy? The first tool is a scatter plot (one dot per observation, x against y), which lets your eye spot a trend instantly.
🔒 This is a Pro lesson — the interactive figure, worked examples, quiz and practice open with Pro access.
▶ Relationships Between Variables