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Table 1 Distribution of the posterior probability (P) with a given LR and number of victims (v)

From: Use of prior odds for missing persons identifications

 

Likelihood ratio (LR)

Prior odds = 1/( v - 1)

100

1,000

10,000

100,000

1,000,000

1/(10-1)

0.917431

0.99108

0.999101

0.99991

0.999991

1/(50-1)

0.671141

0.953289

0.995124

0.99951

0.999951

1/(100-1)

0.502513

0.909918

0.990197

0.999011

0.999901

1/(500-1)

0.166945

0.667111

0.952472

0.995035

0.999501

1/(1,000-1)

0.090992

0.50025

0.909174

0.990109

0.999002

1/(2,000-1)

0.047642

0.333444

0.833403

0.980402

0.998005

1/(5,000-1)

0.019612

0.166694

0.666711

0.95239

0.995026