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. 2019 Dec 11;14(12):e0226243. doi: 10.1371/journal.pone.0226243

Table 3. Statistical indicators for model evaluation.

	Hydrogen			Methane			Carbon dioxide
	CCC^*	r²	CV_RMSE^**	CCC^*	r²	CV_RMSE^**	CCC^*	r²	CV_RMSE^**
M. smithii	0.99	0.98	16	0.96	0.94	18	0.93	0.84	6
M. ruminantium	0.97	0.95	11	0.96	0.93	20	0.99	0.98	2
M. formicium	0.99	0.98	13	0.98	0.96	17	0.92	0.86	8
Mean	0.98	0.97	13	0.97	0.94	18	0.95	0.89	5

* CCC: Lin’s concordance correlation coefficient.

** CV_RMSE: coefficient of variation of the root mean squared error.