Support · Mathematics Standard 11–12 – Year 11 · Data analysis
Support Apply Q_1 - 1.5 × IQR and Q_3 + 1.5 × IQR to formally identify outliers
Resources for the prerequisite content of this dot point: earlier-stage (or earlier sub-level) dot points in the same strand that students usually need first. Use these to fill gaps before or alongside the core lesson.
Prerequisite links are draft mappings generated from the syllabus structure (earlier stage, same strand, closest content). They are being reviewed by teachers. Spot a poor match? Tell us.
Prerequisite dot points
Determine the interquartile range (IQR) for datasets
Stage 5 · Data analysis A Draft mapping
- Interactive toolStarterMathsisfun: Box and whisker plotUse it for: Quartiles and IQR explained with interactive check.
- PhET Center and VariabilityUse it for: Kick a soccer ball to build datasets; see how outliers shift mean, median, range and IQR.
- Corbettmaths practice questions: Averages: QuartilesUse it for: Free printable graded practice questions (with answers) on averages: quartiles for drill or a quick check.
- VideoStarterCorbettmaths video: Averages: QuartilesUse it for: Short worked-example video on averages: quartiles to model the method before practice or for flipped revision.
Compare and explain the relative merits of range and IQR as measures of spread
Stage 5 · Data analysis A Draft mapping
No checked resources on this prerequisite dot point yet.
Identify and explain the impact of outliers on the measures of centre and range
Stage 4 · Data analysis Draft mapping
- Interactive toolStarterMaths Is Fun: OutliersUse it for: Shows how an outlier changes mean and median.
- PhET Center and VariabilityUse it for: Kick a soccer ball to build datasets; see how outliers shift mean, median, range and IQR.