The likelihood ratio is a statistical measure used to compare the probability of two competing hypotheses, often expressed in forensic genetics as the strength of evidence in DNA profiling. It quantifies how much more likely the evidence is under one hypothesis compared to another, typically the hypothesis that a suspect is the source of a DNA sample versus an alternative hypothesis, such as that the DNA comes from an unrelated individual. This ratio provides a clear numerical value that helps in assessing the evidential weight of DNA matches in legal cases.
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