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Symbolically, the time reversal test is satisfied if : |
$P_{01}×P_{10}=0$ $P_{01}×P_{10}>0$ $P_{01}×P_{10}<1$ $P_{01}×P_{10}=1$ |
$P_{01}×P_{10}=1$ |
The correct answer is Option (4) → $P_{01}×P_{10}=1$ The five reversal test for an index number requires that if you reverse base and current periods, the product of 2 index numbers should be 1. Considering $P_{01}$ is the index from period 0 to period 1 and $P_{10}$ is the index from period 1 to period 0, then the time reversal test is satisfied if $P_{01}×P_{10}=1$. |
