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The distribution of nonsilent (NS) substitutions across internal and terminal branches
| Branch type | Number of branches | Exp NS | Obs NS | χ2 |
|---|---|---|---|---|
| Terminal | 357 | 373.6 | 510 | 49.8 |
| Internal | 355 | 371.4 | 235 | 50.1 |
| Sum | 712 | 745.0 | 745 | 99.9 |
The tree in Fig. 1 has significantly more nonsilent substitutions assigned to its terminal branches than expected based on the relative numbers of internal and terminal branches (P < 0.05, df = 1). Exp, expected; Obs, observed.
