CSEMP assessment of CB153 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 | -12.58 | -10.78 | 9.29 | -18.58 | | | |
| linear | 2 | -16.00 | -12.45 | 12.00 | -24.00 | 5.418 | 1 | 0.0199 |
| smooth (df = 2) | 3 | -15.98 | -9.73 | 12.99 | -25.98 | 1.982 | 1 | 0.1592 |
| smooth (df = 3) | 4 | -14.00 | -3.71 | 13.00 | -26.00 | 0.013 | 1 | 0.9095 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 1.6300 | 1.1515 | -0.4785 | 0.1831 | -2.613 | 0.0241 |
| last 20 years | 2000 | 2018 | 1.6300 | 1.1515 | -0.4785 | 0.1831 | -2.613 | 0.0241 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 3.163 | 0.098 | -3.476 | 0.105 | -33.010 | 1.0000 |
| EAC | 3.163 | 20.605 | 1.874 | 0.105 | 17.796 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
