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D3.2.15—Box-and-whisker plots

Box-and-whisker plots summarize variation using median, quartiles, range and outliers for comparing data distributions in inheritance problems in inheritance problems.

Syllabus
First assessment 2025
Objective
D3.2.15
Level
HL

Exam analysis

Chance of appearing3%of analysed past papers
Latest appearanceNovember 2025
Most common paperPaper1B
Typical marks1

Common command terms

  • State
  • Determine
  • Deduce

Recent exam appearances

November 2025Paper1B ["HL"] · TZ12(b)[ 1 ]D3.2.15—Box-and-whisker plots
May 2025Paper1B ["HL"] · TZ14(a)(iii)[ 1 ]D3.2.15—Box-and-whisker plots
May 2025Paper1B ["HL"] · TZ14(a)(ii)[ 1 ]D3.2.15—Box-and-whisker plots
May 2025Paper1B ["HL"] · TZ14(a)(i)[ 1 ]D3.2.15—Box-and-whisker plots
May 2025Paper2 ["HL"] · TZ21(f)[ 1 ]D3.2.15—Box-and-whisker plots
Practice this objective

Coverage 2025–2025 · Updated 16 Jul 2026

Concept essentials

  • The median is the central line, not the mean.
  • The box represents the interquartile range.
  • Overlap and spread matter when comparing distributions.
ConceptIB Biology HL