Tests | Question(s) | H0 | Statistical test |
---|---|---|---|
Utility of each data partition to tree resolution | Does the strength of the signal decay for each partition as branch lengths increase? | No relationship between frequency of CI1 characters and branch length | Linear regression |
 | Is there variation in the contribution of data partitions to node support relative to branch length? | Equal frequency of CI1 characters for each data partition across branch lengths | Chi-square |
 | Is there variation in relative support a partition contributes to short and long branches? | Uniform proportion of CI1 for each data partition across branch lengths | Kruskal-Walis |
Utility of 3rd codon positions | Are third positions less informative than other codon positions? | Uniform frequency of CI1 characters among codon positions | Chi-square |
Conflict among data partitions in the simultaneous analysis | Is there evidence for interaction among data partitions? | Even distribution of PBS across node heights | Spearman's rank correlation |
 | Does simultaneous analysis displace synapomorphies? | No displacement of synapomorphies (HS ≤ 0) in combined analysis | Sign test |