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. 2011 Sep 28;6(9):e24127. doi: 10.1371/journal.pone.0024127

Table 2. Model comparison via log-likelihood ratio tests.

Null Model Experimental Model Probability Testing for Result
Model 0 (one ratio) Model 1a (nearly neutral) <10−3 Do Inline graphics differ among sites? Yes
Model 1a (nearly neutral) Model 2a (positive selection) >0.999 Is there positive selection? No
Model 0 (one ratio) Model 3 (discrete) <10−3 Do Inline graphics differ among sites? Yes
Model 7 (beta) Model 8 (beta & Inline graphic) 0.004 Is there positive selection? Yes