O-LevelMathematicsStatistics4024/12 · May/June 2018 · Q133 Marks
In a school of 270 children, the distance each child can swim was recorded. The distances are summarised in the table. Distance (d metres): 0 < d < 100, 100 ≤ d < 200, 200 ≤ d ≤ 500, 500 ≤ d < 1000 Number of children: 110, 50, 60, 50 Frequency density: (empty row)
- (a)Complete the table to show the frequency densities.[2]
- (b)Calculate an estimate for the number of children who could swim more than 400 metres.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2018). The mark or mark type is shown in brackets.
- [1] B1 for 2 or 3 correct
- [1] 1.1 0.5 0.2 0.1 oe
- [1] 70 cao
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