O-LevelMathematicsStatistics4024/12 · May/June 2020 · Q83 Marks
The number of steps taken by 12 people to walk 100m was recorded. The scatter diagram shows the heights of these people and the number of steps they took.
- (a)What type of correlation is shown in the scatter diagram?[1]
- (b)Draw a line of best fit.[1]
- (c)The height of another person is 175 cm. Use your line of best fit to estimate the number of steps they would take to walk 100m.[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.
- [1] Negative
- [1] Ruled line of best fit
- [1] 136 to 140
- FT their straight line of best fit
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