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O-LevelMathematicsStatistics4024/11 · Oct/Nov 2016 · Q92 Marks

The cumulative frequency graph shows information about the reaction times of 60 people. [Figure 9.1]

  1. (a)Use the graph to estimate the lower quartile,[1]
  2. (b)the number of people who have a reaction time of more than 0.2 seconds.[1]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2016). The mark or mark type is shown in brackets.

  1. [1] (a) 0.155 cao
  2. [1*] (b) 20 WWW

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About this question

Topic
Statistics, O-Level Mathematics (syllabus 4024). Structured question, 2 marks.
Source
O-Level Mathematics, Oct/Nov 2016 Paper 1 Variant 1, question 9.

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