一位图书管理员想了解读者一周内在图书馆度过的时间。他使用了一份调查问卷。列出改进该调查问卷的两种方法。答

它不会直接告诉你答案，而是问你卡在哪一步看看 AI 是怎么陪你一步步弄懂这道题的

完整解法

1. Identify that a possible response is missing

The questionnaire starts with the option $1$ - $2$ hours, so a patron who spends $0$ hours at the library cannot answer accurately.

Add an option such as $0$ hours' or $0$ - $1$ hours'.

2. Identify that the grouping of times can be improved

The intervals are not of equal width: $1$ - $2$ , $3$ - $4$ , $5$ - $7$ , and over $7$ .

Use equal class intervals where possible, for example $0$ - $2$ , $3$ - $5$ , $6$ - $8$ , over $8$ .

答案

Two possible improvements are:

Include an option for patrons who spend $0$ hours at the library in a week.
Make the class intervals equal in width, for example $0$ - $2$ , $3$ - $5$ , $6$ - $8$ , over $8$ hours.

AI 分析，可能出错

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