CSEMP assessment of CB180 in sediment at Forth Estuary
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 96.92 | 98.72 | -45.46 | 90.92 | | | |
| linear | 2 | 95.14 | 98.70 | -43.57 | 87.14 | 3.776 | 1 | 0.0520 |
| smooth (df = 2) | 3 | 88.72 | 94.97 | -39.36 | 78.72 | 8.426 | 1 | 0.0037 |
| smooth (df = 3) | 4 | 87.64 | 97.92 | -37.82 | 75.64 | 3.081 | 1 | 0.0792 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | -1.5029 | -0.7402 | 0.7627 | 0.2562 | 2.977 | 0.0139 |
| last 20 years | 2000 | 2018 | -1.5029 | -0.7402 | 0.7627 | 0.2562 | 2.977 | 0.0139 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.477 | 0.100 | -1.562 | 0.154 | -10.158 | 1.0000 |
| EAC | 0.477 | 12.000 | 3.225 | 0.154 | 20.968 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
