A-LevelMathematicsProbability and statisticsFeb/Mar 2022Paper 6 Q25 Marks
Harry has a five-sided spinner with sectors coloured blue, green, red, yellow and black. Harry thinks the spinner may be biased. He plans to carry out a hypothesis test with the following hypotheses. Ho: P(the spinner lands on blue) = }1/5 H₁: P(the spinner lands on blue) ≠ 3 Harry spins the spinner 300 times. It lands on blue on 45 spins. Use a suitable approximation to carry out Harry's test at the 5% significance level.
📋 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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