A survey was conducted to find out the preferred brand of mobile phone that secondary school students like. State one aspect of the graph that may be misleading and explain how this may lead to a misinterpretation of the graph.

Misinterpretation Analysis interpretation 中文

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1. State one misleading feature of the graph

The vertical axis starts at $4$ instead of $0$ .

2. Explain how this causes misinterpretation

Since the bars are drawn from a truncated scale, the visual differences between the bar heights are exaggerated. For example, Samsung at $14$ may appear far more popular than Apple at $10$ , even though the actual difference is only $4$ students.

Answer

The vertical axis does not start from $0$ ; it starts at $4$ . This makes the differences in the bar heights look larger than they really are, so a reader may think that Samsung is much more popular than Apple or that Huawei is much less popular than Oppo.

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A survey was conducted to find out the preferred brand of mobile phone that secondary school students like. State one aspect of the graph that may be misleading and explain how this may lead to a misinterpretation of the graph.

Worked solution

4

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