CSEMP assessment of CB28 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 | 25.59 | 29.19 | -9.80 | 19.59 | | | |
| linear | 2 | 26.22 | 34.22 | -9.11 | 18.22 | 1.367 | 1 | 0.2424 |
| smooth (df = 2) | 3 | 26.21 | 42.87 | -8.10 | 16.21 | 2.019 | 1 | 0.1553 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2002 | 2017 | -0.3459 | -0.8161 | -0.4702 | 0.3840 | -1.224 | 0.2667 |
| last 20 years | 2002 | 2017 | -0.3459 | -0.8161 | -0.4702 | 0.3840 | -1.224 | 0.2667 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.4421 | 0.1223 | -1.2856 | 0.2402 | -5.351 | 0.9991 |
| EAC | 0.4421 | 0.8710 | 0.6780 | 0.2402 | 2.822 | 0.0151 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
