Composite Index

A composite index combines several individual index numbers into one overall figure, using weights to reflect the relative importance of each item. It is calculated as $\bar{I}=\frac{\sum I_i w_i}{\sum w_i}$, giving a single measure of change for a whole basket of items.

You meet Composite Index in the Index Numbers chapter of SPM Additional Mathematics. Knowing the term precisely matters in the exam: questions often hinge on reading a keyword correctly, and because SPM marking is analytic, using the right definition in your working helps secure method marks.

Our teachers make sure a student can not only recite what Composite Index means but use it fluently in a full solution.

Because the SPM Add Math paper is bilingual (BM/EN), it helps to know this term in each language: Composite Index (EN) · Indeks Gubahan (BM) · 综合指数 (中文)

Other key terms from the Index Numbers chapter you may want to check:

• Index Number
• Price Index
• Weightage
• Base Year