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AP Statistics

5A–5B Basics

Shared by Ashton · Oct 28, 2026 · 2 plays

AP Statistics Unit 5, sections 5A and 5B in full: scatterplots, correlation, regression lines, least squares and computer output, residual plots, r² and s. 40 core-concept questions.

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40 questions across 6 sections. After every answer you’ll see why each choice is right or wrong, not just the one you picked.

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Sections (none selected means all)

Sample questions

Open a question to see the answer choices and the correct answer.

Which pair of variables could be displayed on a scatterplot?
  1. A. Shoe brand and shoe size of 30 students
  2. B. Eye color and favorite sport of 30 students
  3. C. Grade level and lunch choice of 30 students
  4. D. Height (cm) and arm span (cm) of 30 students ✓

Correct answer: D. Both are quantitative and measured on the same 30 students.

When you describe a scatterplot, what does "direction" refer to?
  1. A. How tightly the points cluster around the form
  2. B. Whether any points fall far from the pattern
  3. C. Whether y tends to rise or fall as x increases ✓
  4. D. Whether the points follow a straight-line path

Correct answer: C. Direction is positive, negative, or no association.

A scatterplot's points rise steadily but bend, getting flatter on the right. What is its form?
  1. A. Negative
  2. B. Nonlinear ✓
  3. C. Linear
  4. D. Weak

Correct answer: B. The pattern bends instead of following a straight line.

In the coral example, corallite density tended to fall as depth increased. Does the scatterplot support the claim that deeper colonies have greater density?
  1. A. No, because scatterplots can never test claims
  2. B. Yes, because the points form a clear pattern
  3. C. No, because density tends to decrease with depth ✓
  4. D. Yes, because the deepest colony had high density

Correct answer: C. The trend runs the opposite way from the claim.

Why must a scatterplot description be "in context"?
  1. A. You must list every point's x-value and y-value
  2. B. You must name the variables and observational units ✓
  3. C. You must give the equation of the regression line
  4. D. You must state the exact value of the correlation

Correct answer: B. The AP exam expects the variable names and the units (who or what was measured).