STA013 · Probability & statistics · Classes 9–12
Scatter plot
A scatter plot shows pairs of values as points, revealing whether one variable tends to rise or fall with the other.
• ⋰Scatter plot
📐 Formula
points (xᵢ, yᵢ)
✏️ Worked example
With trend 1 and small noise the points climb steadily: a strong positive pattern (r ≈ 0.95).
🌍 Where it is used
Study time vs marks, temperature vs ice-cream sales.
❓ Quick check
Points falling from left to right show…
🏋️ Practice
EasyHeight vs shoe size: likely association?
Answer: Positive
MediumPoints with no pattern show…?
Answer: No correlation
ChallengeDoes a scatter plot prove cause?
Answer: No