Year 13 WJEC Statistics: Mastering Case Study Analysis | A Level WJEC 统计：案例分析实战演练

📚 Year 13 WJEC Statistics: Mastering Case Study Analysis | A Level WJEC 统计：案例分析实战演练

In Year 13 WJEC Statistics, the ability to apply a wide range of inferential techniques to a single real-world scenario is a crucial skill. This practical drill walks you through a comprehensive case study, demonstrating how hypotheses are formulated, assumptions checked, and appropriate tests selected and interpreted. Mastering this integrated approach not only prepares you for examination questions but also deepens your understanding of statistical reasoning in context.

在 WJEC 的 Year 13 统计课程中，将各种推断技术灵活运用于同一个真实情境是一项关键能力。本篇实战演练带你深入一个完整的案例研究，展示如何构建假设、检验前提条件、选择合适的检验方法并加以解读。掌握这种综合分析方法，不仅有助于应对考试题目，也能加深你对统计推理在具体情境中应用的理解。

1. Case Introduction and Data Overview | 案例介绍与数据概览

A sixth-form college introduced an online learning platform to supplement classroom teaching in mathematics. To evaluate its effectiveness, 20 Year 13 students were randomly selected. They took a pre-test before using the platform and a similar post-test after eight weeks. Additional data were recorded: gender, average weekly hours spent on the platform, and a satisfaction survey at the end. The satisfaction survey asked students to choose from ‘Very Satisfied’, ‘Satisfied’, ‘Neutral’, or ‘Dissatisfied’. Usage level was categorised as Low (<3 hours/week), Medium (3–6 hours), or High (>6 hours). The sample mean pre-test score was 72.3 (sd=8.4), post-test mean 76.8 (sd=7.9), giving a mean difference of 4.5 marks with a standard deviation of 5.2.

某高中六年级学院引入了一个在线学习平台，作为数学课堂教学的补充。为评估其效果，随机选取了20名 Year 13 学生。他们在使用平台前参加了一次前测，八周后参加了一次类似的后测。此外，还记录了性别、每周在平台上的平均学习时长以及最终的满意度调查

Published by TutorHao | Year 13 统计 Revision Series | aleveler.com

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