O-LevelMathematicsStatistics4024/11 · May/June 2018 · Q134 Marks
The table below shows the masses of 10 mothers and their babies at birth. | Mass of mother (kg) | 64 | 90 | 54 | 102 | 57 | 105 | 70 | 89 | 57 | 75 | |---|---|---|---|---|---|---|---|---|---|---| | Mass of baby (kg) | 4.1 | 4.5 | 3.6 | 4.5 | 3.9 | 5.5 | 3.9 | 4.3 | 3.2 | 4.4 |
- (a)On the grid, complete the scatter diagram. The first six points have been plotted for you. [Figure 13.1][1]
- (b)What type of correlation is shown on the scatter diagram?[1]
- (c)On the scatter diagram, draw a line of best fit.[1]
- (d)Anna has a mass of 82 kg and gives birth to a baby. Use your line of best fit to estimate the mass of her baby.[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 2018). The mark or mark type is shown in brackets.
- [1] 4 points correctly plotted
- [1] positive
- [1] Ruled line of best fit drawn
- [1] 4.35 - 4.55
- Dependent on a line of best fit or FT their straight line of best fit with +ve gradient
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