Index NumbersPYQ Jan 26Question 4545 of 197
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The test of shift ability of the base is called?

Options

AUnit test
BFactor reversal test
CTime reversal test
DCircular test
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Correct Answer

Option dCircular test

All Options:

  • AUnit test
  • BFactor reversal test
  • CTime reversal test
  • DCircular test

Detailed Solution & Explanation

In index numbers, the **Circular Test** is an extension of the time reversal test. It tests the shiftability of the base year.
A circular test requires that if an index number is computed for period b\displaystyle b with period a\displaystyle a as base (Iab\displaystyle I_{ab}), and for period c\displaystyle c with period b\displaystyle b as base (Ibc\displaystyle I_{bc}), and for period a\displaystyle a with period c\displaystyle c as base (Ica\displaystyle I_{ca}), then their product should be unity:
Iab×Ibc×Ica=1I_{ab} \times I_{bc} \times I_{ca} = 1
This property enables shifting of the base year without calculating the index numbers from the beginning. Therefore, the test of shiftability of the base is called the Circular 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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