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Equivalence test output for all field samples and by site
| Sampling site | Number of samples | Mean difference % | Equivalent within 25% P value | Equivalent within 30% P value |
|---|---|---|---|---|
| All | 138 | 18.5 | 0.0112 | <0.0001 |
| Site A | 21 | 21.1 | 0.2156 | 0.0414 |
| Site B | 21 | 44.7 | 0.9788 | 0.9393 |
| Site C | 22 | −1.3 | 0.0009 | 0.0002 |
| Site D | 25 | 26.2 | 0.6295 | 0.1521 |
| Site E | 23 | 6.0 | 0.0030 | 0.0005 |
| Site F | 26 | 15.9 | 0.0834 | 0.0184 |
