O-LevelMathematicsStatistics4024/12 · Oct/Nov 2017 · Q133 Marks
The distribution of the lengths of time spent on the internet on a Monday by each member of a group of students is given in the table. Time (t minutes) 10 < t ≤ 30 30 < t ≤ 40 40 < t ≤ 50 50 < t ≤ 80 Frequency k 50 30 30 The histogram represents some of this information.
- (a)Find k.[1]
- (b)Complete the histogram.[2]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2017). The mark or mark type is shown in brackets.
- [1] 13(a) 40
- [1] 13(b) rectangle: base 40 to 50; frequency density (height) 3
- [1] 13(b) rectangle: base 50 to 80; frequency density (height) 1
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