图表显示了表现出各种症状的新冠肺炎 (Covid-19) 患者的百分比。

(a)
解释为什么表现出新冠肺炎症状的人的总百分比加起来超过 100%。
(b)
解释将这些数据呈现在饼图上是否合适。

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完整解法

8(a)

1. Explain why the listed percentages can overlap

The percentages are for each symptom separately. A Covid-19 patient can have several symptoms, for example both fever and cough, so the same patient may be included in more than one percentage.

答案

The total is more than $100\%$ because one patient may display more than one symptom, so the symptom percentages overlap and are counted more than once.

8(b)

1. Justify whether a pie chart is suitable for the symptom data

A pie chart shows how one whole is divided into non-overlapping categories that add to $100\%$ . Here, one patient may display more than one symptom, so the symptom categories overlap and the percentages add to more than $100\%$ . Hence, a pie chart is not appropriate.

答案

No. A pie chart is not appropriate because patients may have more than one symptom, so the categories overlap and the percentages do not form parts of a single whole adding to $100\%$ .

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图表显示了表现出各种症状的新冠肺炎 (Covid-19) 患者的百分比。

完整解法

8(a)

8(b)

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