Index Numbers and Time Based Data
CBSE · Class 12 · Applied Mathematics
Quick revision notes for Index Numbers and Time Based Data — CBSE Class 12 Applied Mathematics. Key concepts, formulas, and definitions for last-minute revision.
Key Topics to Revise
Concept and Types of Index Numbers
- Index number measures change in a group of related variables over two different situations (time, place, etc.)
- Base period index is always 100 for comparison purposes
- Index series is a collection of index numbers for different periods using same base
Simple (Unweighted) Methods
- Simple Aggregative Method: Sum of current prices divided by sum of base prices
- Major limitation: dominated by high-priced commodities
- Simple Average of Relatives: Average of individual price relatives
Weighted Aggregative Methods
- Laspeyres Index: Uses base year quantities as weights
- Paasche Index: Uses current year quantities as weights
- Fisher's Ideal Index: Geometric mean of Laspeyres and Paasche indices
Tests of Adequacy
- Unit Test: Index should be independent of units of measurement
- Time Reversal Test: P₀₁ × P₁₀ = 1 (where P₀₁ and P₁₀ are reciprocal indices)
- Factor Reversal Test: Price index × Quantity index = Value index
Get complete notes with diagrams and examples
Full NotesKey Concepts
Get detailed revision notes for Index Numbers and Time Based Data
Super Tutor gives you interactive content for every chapter of CBSE Class 12 Applied Mathematics — summaries, quizzes, flashcards, and more.
Try Super Tutor — It's FreeFrequently Asked Questions
What are the important topics in Index Numbers and Time Based Data for CBSE Class 12 Applied Mathematics?
Index Numbers and Time Based Data covers several key topics that are frequently asked in CBSE Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Index Numbers and Time Based Data — CBSE Class 12 Applied Mathematics?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More Resources for Index Numbers and Time Based Data
Important Questions
Practice with board exam-style questions
Syllabus
What topics to cover
Study Plan
Step-by-step plan to ace this chapter
Flashcards
Quick-fire cards for active recall
Formula Sheet
All formulas in one place
Chapter Summary
Understand the chapter at a glance
Practice Quiz
Test yourself with a quick quiz
Concept Maps
See how topics connect visually