Index NumbersMCQMTP June 2023 Series IIQuestion 3856 of 197
All Questions

Circular test is satisfied by which of the following index?

Options

ALaspeyres index
BPaasche's index
CFisher's index
DSimple geometric mean of price relatives
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Correct Answer

Option dSimple geometric mean of price relatives

All Options:

  • ALaspeyres index
  • BPaasche's index
  • CFisher's index
  • DSimple geometric mean of price relatives

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Detailed Solution & Explanation

The **Circular Test** requires that the index formula allows for base shifting easily, such that: P01×P12×P20=1P_{01} \times P_{12} \times P_{20} = 1 Let's analyze the methods that satisfy this: 1. **Simple Geometric Mean of Price Relatives**: Pab=(i=1npb,ipa,i)1nP_{ab} = \left(\prod_{i=1}^n \frac{p_{b,i}}{p_{a,i}}\right)^{\frac{1}{n}} P01×P12×P20=(i=1np1,ip0,i)1n×(i=1np2,ip1,i)1n×(i=1np0,ip2,i)1n=1P_{01} \times P_{12} \times P_{20} = \left(\prod_{i=1}^n \frac{p_{1,i}}{p_{0,i}}\right)^{\frac{1}{n}} \times \left(\prod_{i=1}^n \frac{p_{2,i}}{p_{1,i}}\right)^{\frac{1}{n}} \times \left(\prod_{i=1}^n \frac{p_{0,i}}{p_{2,i}}\right)^{\frac{1}{n}} = 1 Thus, simple GM of price relatives satisfies the test. 2. **Weighted Aggregative Index with Fixed Weights**: Pab=pbwpawP_{ab} = \frac{\sum p_b w}{\sum p_a w} P01×P12×P20=(p1wp0w)×(p2wp1w)×(p0wp2w)=1P_{01} \times P_{12} \times P_{20} = \left(\frac{\sum p_1 w}{\sum p_0 w}\right) \times \left(\frac{\sum p_2 w}{\sum p_1 w}\right) \times \left(\frac{\sum p_0 w}{\sum p_2 w}\right) = 1 Thus, the weighted aggregative index with fixed weights also satisfies the test. Standard weighted indexes with variable weights (like Laspeyres, Paasche, Fisher) do not satisfy this test. Hence, **Option D** is the correct answer.

About This Chapter: Index Numbers

Paper

Paper 3: Quantitative Aptitude

Weightage

4-6 Marks

Key Topics

Construction of Index Numbers, Time Series

This chapter covers Construction of Index Numbers, Time Series and is part of Paper 3: Quantitative Aptitude in the CA Foundation exam.

View Official ICAI Syllabus

Exam Strategy Tip

This topic carries 4-6 Marks weightage. Focus on understanding core concepts rather than memorizing.

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