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Trends in total annual Ambrosia pollen counts (SPI) recorded in Rzeszów, Kraków and Poznań during 1997–2009
| SPI | |||
|---|---|---|---|
| Rzeszów | Kraków | Poznań | |
| Mean | 378.0 | 170.5 | 126.5 |
| SD | 212.6 | 122.0 | 109.5 |
| CV(%) | 56.3 | 71.6 | 86.5 |
| slope | -19.0 | 12.0 | -7.5 |
| SE | 18.3 | 8.7 | 8.2 |
| R 2 | 0.1 | 0.1 | 0.1 |
| P | 0.3 | 0.2 | 0.4 |
