Year 10 WJEC Statistics: Vocabulary Memorisation Guide | WJEC十年级统计：词汇术语速记指南

📚 Year 10 WJEC Statistics: Vocabulary Memorisation Guide | WJEC十年级统计：词汇术语速记指南

Mastering statistical terminology is the first step to success in your WJEC Year 10 Statistics course. Clear understanding of key words helps you read exam questions accurately and communicate your answers with precision. This guide breaks down essential vocabulary into logical categories and provides memorable tricks to help you learn and retain them faster.

掌握统计术语是在WJEC十年级统计课程中取得成功的第一步。准确理解关键词汇有助于你精确地解读考题并清晰地表达答案。本指南将核心词汇划分为逻辑清晰的类别，并提供巧妙的记忆窍门，帮助你快速学习并牢固掌握。

1. Types of Data | 数据类型

Data comes in different forms, and WJEC questions often ask you to classify them. Knowing these terms inside out will save you marks.

数据以不同形式出现，WJEC考题常常要求你对它们进行分类。彻底掌握这些术语可以让你稳拿分数。

Qualitative data describes qualities or categories (e.g., eye colour, car brand). It is non‑numerical.

定性数据描述性质或类别（如眼睛颜色、汽车品牌），是非数值型数据。

Quantitative data consists of numbers that can be measured or counted.

定量数据由可测量或可计数的数字组成。

Discrete data can only take specific, separate values (e.g., number of students, dice roll outcomes). ‘Discrete’ hints at ‘distinct’.

离散数据只能取特定的、分开的数值（例如学生人数、掷骰子结果）。‘Discrete’可联想‘distinct（不同的）’来记忆。

Continuous data can take any value within a range (e.g., height, time, temperature). Think of a continuous line.

连续数据可以在某个范围内取任意值（例如身高、时间、温度）。想象一条连续的线。

Memory trick: ‘DISCo’ – Discrete Is Separate, Continuous flows on.

记忆窍门：’DISCo’——离散（Discrete）是分离的，连续（Continuous）是流动的。

2. Measures of Central Tendency | 集中趋势度量

The three ‘averages’ are fundamental. You must be able to calculate each one and know when to use them.

三种“平均数”是基础。你必须会计算每一种，并知道何时使用它们。

Mean: sum of all data values ÷ number of values (x̄ = Σx ÷ n). The most widely used average, but affected by extreme values.

平均数（均值）：所有数据值之和 ÷ 数据个数（x̄ = Σx ÷ n）。最常用的平均数，但受极端值影响。

Median: the middle value when data are ordered. For n values, position = (n+1)/2. Unaffected by outliers.

中位数：数据排序后位于中间的值。如果有n个值，位置 = (n+1)/2。不受异常值影响。

Mode: the most frequent value(s). A data set can have no mode, one mode (unimodal) or more than one (bimodal, multimodal).

Published by TutorHao | Year 10 统计 Revision Series | aleveler.com

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