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likelihood ratio

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likelihood ratio

[′līk·lē‚hu̇d ‚rā·shō]
(statistics)
The probability of a random drawing of a specified sample from a population, assuming a given hypothesis about the parameters of the population, divided by the probability of a random drawing of the same sample, assuming that the parameters of the population are such that this probability is maximized.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive
Hutson, "Simple and exact empirical likelihood ratio tests for normality based on moment relations," Communications in Statistics--Simulation and Computation, vol.
Based on Lemmas 3, 4, and 5, and also (32) and (40), the likelihood ratio is obtained:
Opposite to the pattern of dropping on dragline behaviors, the tip-toeing events occurred in higher numbers per trial during the day (mean [+ or -] SD = 0.87 [+ or -] 1.5) than during the night (mean [+ or -] SD = 0.08 [+ or -] 0.28) (likelihood ratio test: Chisq = 44.2, df = 1, P = 2.9 X[10.sup.-11]).
The result was discussed based on the statistical value from likelihood ratio test and Wald test.
Lempert argued for a likelihood ratio of 1 as the defining characteristic of relevance by relying on a third justification--the Bayesian model of learning.
separates the ultimate degree of doubt a DM feels regarding the guilt of a defendant, as expressed via posterior odds (i.e., probability of guilt after considering the evidence divided by probability of innocence after considering the evidence), into degree of doubt felt before consideration of the evidence at hand (prior odds) and the influence or weight of the newly considered evidence expressed as a likelihood ratio for the DM (LRDM).
In other words, likelihood ratio negative (LR-) is ratio of false negative rate with specificity.
Variables Bacterial Non-bacterial sepsis sepsis Sample size 20 74 Mean value (mg/L) 30.94 7.46 95% Confidence interval 25.13 to 36.74 7.05 to 7.87 t value -5.598 Degree of Freedom 131.0 P value P = <0.001 Table 3: Sensitivity, Specificity, Diagnostic Accuracy, Positive Predictive Value (PPV), Negative Predictive Value (NPV), Positive Likelihood Ratio (PLR), Negative Likelihood Ratio (NLR) and Area Under the Curve (AUC) of CRP for the diagnosis of sepsis.
The findings indicated that the APPY1 Test had a sensitivity of 96.9% (95% CI, 94.9-98.1%), a negative predictive value of 97.3% (95% CI, 95.5-98.3%), a negative likelihood ratio of 0.08 (95% CI, 0.05-0.14), and a specificity of 37.8% (95% CI, 35.5-40.4%) for acute appendicitis.
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