O-LevelMathematicsStatistics4024/11 · May/June 2020 · Q105 Marks
The table below shows the height of a plant, in centimetres, and the number of days after planting. Number of days: 15, 24, 33, 40, 45, 51, 62, 68, 73, 80 Height (cm): 8.5, 9.1, 9.5, 9.8, 10.5, 10.8, 11.3, 11.4, 11.8, 11.8
- (a)On the grid, complete the scatter diagram. The first five points have been plotted for you.[2]
- (b)What type of correlation is shown on the scatter diagram?[1]
- (c)Draw a line of best fit.[1]
- (d)Can the scatter diagram be used to predict the height of this plant 100 days after planting? Give a reason for your answer.[1]
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 (May/June 2020). The mark or mark type is shown in brackets.
- [2] 5 points plotted correctly
- [1] positive
- [1] Ruled line of best fit drawn
- [1] No, because we do not have any data beyond 80 days
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