ExpertMedium2 marksStructured
AQA GCSE · Question 06.5 · Interpreting Results and Evaluating Findings
Another adult dog comes to the vet. It has a mass of 19 kg and a height of 38 cm. Is it likely to be a Vizsla? Give a reason for your answer.
Another adult dog comes to the vet. It has a mass of 19 kg and a height of 38 cm. Is it likely to be a Vizsla? Give a reason for your answer.
How to approach this question
1. Consider the point (19, 38) in the context of your scatter graph.
2. Mentally (or physically) plot this point on the graph.
3. Observe where this point lies in relation to the other data points and your line of best fit.
4. If it is far away from the main cluster of points and the line of best fit, it is an outlier and unlikely to be from the same population.
5. Formulate your reason based on this observation.
Full Answer
No. A dog with a mass of 19kg and height of 38cm would be an outlier / would not fit the trend of the data for Vizslas. Its height is much lower than expected for its mass based on the other dogs.
To determine if the dog is likely to be a Vizsla, we compare its measurements (19 kg, 38 cm) to the data on the scatter graph.
If we plot the point (19, 38), we can see it would be far below the main cluster of points. For a mass of 19 kg, the line of best fit would predict a height of around 52-54 cm. A height of 38 cm is significantly lower.
Therefore, this point is an outlier and does not follow the positive correlation shown by the other Vizsla dogs. It is unlikely that this dog is a Vizsla.
Answer: No.
Reason: The point (19, 38) is an outlier and does not fit the trend of the data.
Common mistakes
✗ Giving a reason without making a "Yes/No" decision.\n✗ Providing a weak reason like "it's not on the graph" instead of explaining why its position is significant (i.e., it's an outlier).
Practice the full AQA GCSE Statistics Foundation Tier Paper 2
45 questions · hints · full answers · grading
More questions from this exam
Q01A set of data is ordered from smallest to largest. What is the name given to the measure that is ...EasyQ02Look at these sets of data. Which data set has a different range to the others?
A: 2, 4, 5, 5, 7,...EasyQ03The probability that a biased coin lands on heads is 2/5. What is the probability that this coin ...EasyQ04Which of these diagrams could be suitable for displaying raw discrete data?EasyQ05.1The table shows the annual sales value (£ million) in the UK of different ways to buy music. Writ...Easy