Easy1 markExtended Response
Interpreting Results and Evaluating Findingsmodellingevaluationlimitationsfoundation

AQA GCSE · Question 16.5 · Interpreting Results and Evaluating Findings

Give a reason why the house may actually sell at this minimum price.

How to approach this question

The calculation is based on a mathematical model. Think about the difference between a model and reality. Can a simple model perfectly predict complex human behaviour like buying a house?

Full Answer

The relationship is just a model and may not hold true for all prices. / External factors could change, like a sudden increase in house prices in the area. / A specific buyer might be willing to pay that price for personal reasons.
The calculation that the house will "never sell" at £155,000 is based on a simple linear probability model. This model is a simplification of reality and has limitations. A key reason the house might still sell is that **the model may not be accurate at extreme values**. The relationship where risk increases by 0.05 for every £1000 might only be valid within a certain price range. Other reasons include: - **Changing Market Conditions:** The housing market could change unexpectedly, making £155,000 seem like a reasonable price. - **Specific Buyer Needs:** A particular buyer might have a strong personal reason to want that specific house (e.g., it's next to a relative) and be willing to pay a premium for it, regardless of the general market model.

Common mistakes

✗ Stating that the calculation was wrong. The question asks why the model's prediction might be wrong in the real world. ✗ Giving an irrelevant answer, e.g., "the seller might lower the price".

Practice the full AQA GCSE Statistics Foundation Tier Paper 1

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