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AP Statistics

5A–5B Vocab

Shared by Ashton · Oct 28, 2026 · 6 plays

AP Statistics Unit 5 vocabulary for all of 5A and 5B: definition to term, term to definition, and spot-it-in-context questions on scatterplots, correlation, least squares, residual plots, r² and s. 40 questions.

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40 questions across 3 sections. After every answer you’ll see why each choice is right or wrong, not just the one you picked.

Round length
Sections (none selected means all)

Sample questions

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

Which term means the line that makes the sum of squared residuals as small as possible?
  1. A. Line of zero residuals
  2. B. Correlation trend line
  3. C. Standardized residual line
  4. D. Least-squares regression line ✓

Correct answer: D. It minimizes the sum of the squared residuals.

Which term means a graph of the residuals against the explanatory variable (or ŷ)?
  1. A. Dotplot
  2. B. Scatterplot
  3. C. Residual plot ✓
  4. D. Mosaic plot

Correct answer: C. It plots each residual against x (or ŷ).

Which term means the percent of variation in y explained by the least-squares line with x?
  1. A. Regression slope coefficient
  2. B. Standard deviation of x
  3. C. Correlation coefficient
  4. D. Coefficient of determination ✓

Correct answer: D. Written r².

Which term means the typical distance between actual y-values and the line's predicted values?
  1. A. Standard deviation of residuals ✓
  2. B. Standard deviation of x-values
  3. C. Coefficient of determination
  4. D. Sum of the squared residuals

Correct answer: A. Written s.

Which term means a point whose removal would substantially change the least-squares line?
  1. A. Influential point ✓
  2. B. Centered point
  3. C. Typical point
  4. D. Residual point

Correct answer: A. Removing it moves the slope or intercept a lot.