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. 2011 May 23;6(5):e20296. doi: 10.1371/journal.pone.0020296

Table 1. Comparison of results from two group comparison.

T-testp-value Wilcoxonp-value Two-partp-value
CF study
Veillonella dispar 0.50* 0.07** 0.02***
Granulicatella adiacens 0.74* 0.04*** 0.05***
Streptococcus sanguis 0.37* 0.96** 0.75***
Cenote study
Desulfobacca <0.01*** 0.01*** 0.03**
Chlorobium 0.27** 0.44** <0.01***
Dehalogenimonas <0.01** 0.22** 0.08***

*Distribution for taxa includes an outlier which results in incorrect inferences.

**Assumptions of the test are not optimal given the distribution of the taxa (i.e., skewness, large proportion of zeros or power).

***Most optimal approach, given the distribution of the taxa.