CSEMP assessment of CB138 in biota at Crosby (Mersey Channel)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 51.89 | 53.89 | -22.94 | 45.89 | | | |
| linear | 2 | 46.10 | 50.10 | -19.05 | 38.10 | 7.792 | 1 | 0.0052 |
| smooth (df = 2) | 3 | 48.09 | 55.23 | -19.04 | 38.09 | 0.008 | 1 | 0.9282 |
| smooth (df = 3) | 4 | 50.06 | 62.06 | -19.03 | 38.06 | 0.030 | 1 | 0.8627 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 1.3937 | 0.4377 | -0.9559 | 0.2838 | -3.369 | 0.0071 |
| last 20 years | 2000 | 2018 | 1.3937 | 0.4377 | -0.9559 | 0.2838 | -3.369 | 0.0071 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.549 | 0.098 | -2.7626 | 0.1679 | -16.452 | 1.0000 |
| EAC | 1.549 | 4.121 | 0.9784 | 0.1679 | 5.827 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
