Year 7 WJEC Statistics: Case Study Practical Workout | 七年级 WJEC 统计：案例分析实战演练

📚 Year 7 WJEC Statistics: Case Study Practical Workout | 七年级 WJEC 统计：案例分析实战演练

In this article, we will work through a complete statistical case study following the Year 7 WJEC curriculum. By using a real dataset about students’ reading habits, you will practise collecting, organising, presenting and interpreting data. This hands-on approach will strengthen your understanding of averages, range and charts.

本文将按七年级 WJEC 课程要求，完整演练一个统计案例。我们将使用一组关于学生阅读习惯的真实数据，练习数据的收集、整理、展示和解读。这种动手实践的方式将加深你对平均数、范围和图表的理解。

1. Introduction to the Case Study | 案例介绍

A Year 7 class at Greenfield School wanted to investigate the daily reading habits of their peers. They surveyed 30 students to collect two sets of data: the number of minutes spent reading each day, and their favourite type of reading material.

格林菲尔德学校的一个七年级班级想调查同龄人的日常阅读习惯。他们调查了 30 名学生，收集了两组数据：每天阅读的分钟数，以及他们最喜欢的阅读材料类型。

This case study will guide you through the entire statistical enquiry cycle — from posing a question to drawing conclusions. You will see how each step connects, just as you would in your own projects.

本案例将带你走完整个统计探究循环——从提出问题到得出结论。你将看到每个步骤如何紧密相连，就如同你在自己的项目中要做的那样。

2. Setting the Data Collection Questions | 设定数据收集问题

Good statistics start with clear questions. The class decided on two survey questions:
Question 1: ‘How many minutes do you usually spend reading for pleasure each day?’
Question 2: ‘What type of reading material do you enjoy most?’ (options: Fiction, Non-fiction, Comics, Magazines, Online articles)

好的统计始于清晰的问题。全班确定了两道调查问题：
问题一：‘你通常每天花多少分钟进行休闲阅读？’
问题二：‘你最喜爱哪一类阅读材料？’（选项：小说、非小说、漫画、杂志、网络文章）

The first question produces numerical (quantitative) data, while the second gives categorical (qualitative) data. This variety lets you practise different analysis techniques.

第一个问题产生数值（定量）数据，而第二个给出分类（定性）数据。这种多样性让你能练习不同的分析技巧。

3. Designing a Data Collection Table | 设计数据收集表

Before collecting responses, it is wise to prepare a recording sheet. The class used a simple table with two columns: ‘Student’ (just numbered 1–30) and ‘Minutes reading’. A separate table was prepared for the favourite type, with tally marks.

在收集回答之前，明智的做法是准备一张记录表。班级使用了一张简单的表格，包含两列：‘学生’（仅编号 1–30）和‘阅读分钟数’。另外还为最喜欢的类型准备了一张带计数符号的表格。

Using a tally chart for the categorical question helps avoid mistakes. Tally marks are grouped in fives (|||| for 4, then the fifth line crosses them).

对分类问题使用计数表有助于避免错误。计数符号以五个为一组（|||| 表示 4，第五笔划一条横线穿过）。

4. Collecting the Data: Tally Charts | 收集数据：计数表

Here is the tally chart for the type of reading material. The class recorded each student’s choice with a tally mark.

以下是阅读材料类型的计数表。班级用计数符号记录了每个学生的选择。