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HigherNon-calculatorS4 Averages

Question 1 · 3 marks

Spec and skills
  • Paper scope: Paper 1: non-calculator practice
  • Spec S4
  • Spec S3
  • Original practice question
  • Answer and supported method checks
Two schools sat the same test. School AA: median 60, lower quartile 45, upper quartile 73. School BB: median 64, lower quartile 58, upper quartile 70.
Compare the distributions of the marks at the two schools.

Spread: IQR A=73−45=28A = 73 - 45 = 28, IQR B=70−58=12B = 70 - 58 = 12, so BB's marks were more consistent.

Start with the key line of working.