Which of the following statements about the circular test is correct?
A. It is also known as the time reversal test.
B. Fisher's ideal index satisfies it.
C. It requires that P₀₁ × P₁₀ = 1.
D. The circular test is satisfied if P₀₁ × P₁₂ × P₂₀ = 1.
Answer: Option D
Solution (By JKExamLibrary)
Circular test checks consistency over multiple periods: the product of indices from 0 to 1, 1 to 2, and 2 back to 0 should equal 1. Time reversal is P₀₁×P₁₀=1.
Explanation:
Maternal deaths are uncommon; using 100,000 as the base yields manageable numbers (e.g., 100-500) instead of tiny decimals, facilitating interpretation and cross-country comparison.
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