scholarly journals A Likelihood Ratio Test of Speciation with Gene Flow Using Genomic Sequence Data

2010 ◽  
Vol 2 ◽  
pp. 200-211 ◽  
Author(s):  
Ziheng Yang
Keyword(s):  
Gene Flow ◽  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Genomic Sequence ◽  
Sequence Data ◽  
Ratio Test

scholarly journals A likelihood ratio test for species membership based on DNA sequence data

2005 ◽  
Vol 360 (1462) ◽  
pp. 1969-1974 ◽  
Author(s):  
Mikhail V Matz ◽  
Rasmus Nielsen
Keyword(s):  
Dna Barcoding ◽  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Sequence Data ◽  
A Priori ◽  
Real Data ◽  
Ratio Test ◽  
Sequence Variability ◽  
Dna Sequence Data ◽  
Measure Of Uncertainty

DNA barcoding as an approach for species identification is rapidly increasing in popularity. However, it remains unclear which statistical procedures should accompany the technique to provide a measure of uncertainty. Here we describe a likelihood ratio test which can be used to test if a sampled sequence is a member of an a priori specified species. We investigate the performance of the test using coalescence simulations, as well as using the real data from butterflies and frogs representing two kinds of challenge for DNA barcoding: extremely low and extremely high levels of sequence variability.

Comparing Groups of Life-Course Sequences Using the Bayesian Information Criterion and the Likelihood-Ratio Test

2020 ◽  
pp. 008117502095940
Author(s):  
Tim Futing Liao ◽  
Anette Eva Fasang
Keyword(s):  
Life Course ◽  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Simulation Study ◽  
Bayesian Information Criterion ◽  
Sequence Data ◽  
Information Criterion ◽  
West Germany ◽  
Ratio Test ◽  
Life Courses

How can we statistically assess differences in groups of life-course trajectories? The authors address a long-standing inadequacy of social sequence analysis by proposing an adaption of the Bayesian information criterion (BIC) and the likelihood-ratio test (LRT) for assessing differences in groups of sequence data. Unlike previous methods, this adaption provides a useful measure for degrees of difference, that is, the substantive significance, and the statistical significance of differences between predefined groups of life-course trajectories. The authors present a simulation study and an empirical application on whether employment life-courses converged after reunification in the former East Germany and West Germany, using data for six birth-cohort groups ages 15 to 40 years from the German National Education Panel Study. The new methods allow the authors to show that convergence of employment life-courses around reunification was stronger for men than for women and that it was most pronounced in terms of the duration of employment states but weaker for their order and timing in the life-course. Convergence of East German and West German women’s employment lives set in earlier and reflects a secular trend toward a more gender-egalitarian division of labor in West Germany that is unrelated to reunification. The simulation study and the substantive application demonstrate the usefulness of the proposed BIC and LRT methods for assessing group differences in sequence data.

A likelihood ratio test for detecting patterns of disease-marker association

1997 ◽  
Vol 61 (4) ◽  
pp. 335-350 ◽  
Author(s):  
A. P. MORRIS ◽  
J. C. WHITTAKER ◽  
R. N. CURNOW
Keyword(s):  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Ratio Test ◽  
Disease Marker

A Likelihood Ratio Test of the Equality of Paired Survival Data with Censoring

1986 ◽  
Vol 28 (6) ◽  
pp. 665-672 ◽  
Author(s):  
R. G. Knapp ◽  
A. J. Gross ◽  
A. B. Cantor
Keyword(s):  
Likelihood Ratio ◽  
Likelihood Ratio Test ◽  
Survival Data ◽  
Ratio Test
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