Year 8 CIE Statistics: Formula & Theorem Quick Reference Handbook | Year 8 CIE 统计：公式定理速查手册

📚 Year 8 CIE Statistics: Formula & Theorem Quick Reference Handbook | Year 8 CIE 统计：公式定理速查手册

Welcome to the Year 8 CIE Statistics quick reference handbook. This guide summarises the essential formulas, theorems and graphical techniques you need to master data handling and probability. Keep it handy for revision and homework.

欢迎使用 Year 8 CIE 统计公式定理速查手册。本手册归纳了数据分析和概率部分必须掌握的核心公式、定理和图表技巧，方便你随时复习和完成作业。

1. Mean, Median and Mode | 平均数、中位数与众数

The mean is the arithmetic average. To find the mean, add up all the values and divide by the number of values.

平均数即算术平均值。计算方法是将所有数据值相加，再除以数据个数。

Mean = Σx ÷ n

where Σx represents the sum of all data values and n is the total number of values.

其中 Σx 表示所有数据值的和，n 表示数据总个数。

The median is the middle value when the data are arranged in order. If there are two middle values, the median is the mean of those two values.

中位数是将数据按大小顺序排列后位于中间位置的数值。如果有两个中间数，则中位数为这两个数的平均数。

The

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