A-LevelMathematicsProbability and statisticsMay/June 2025Paper 5 Q310 Marks
Last Sunday, teams of runners took part in a charity event. The time taken, in seconds, to run 50m was recorded, correct to 1 decimal place, for each runner. The times recorded for 11 runners from each of the Gulls and the Herons are shown in the table. Gulls | 7.9 | 8.2 | 8.3 | 8.6 | 8.6 | 8.8 | 9.2 | 9.7 | 9.8 | 10.0 | 10.4 Herons | 9.5 | 9.9 | 8.5 | 8.1 | 9.2 | 10.8 | 8.3 | 9.7 | 9.3 | 9.9 | 8.7
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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