CSEMP assessment of CB28 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 | 105.09 | 107.09 | -49.55 | 99.09 | | | |
| linear | 2 | 102.45 | 106.45 | -47.23 | 94.45 | 4.641 | 1 | 0.0312 |
| smooth (df = 2) | 3 | 86.81 | 93.95 | -38.40 | 76.81 | 17.644 | 1 | <0.0001 |
| smooth (df = 3) | 4 | 87.37 | 99.37 | -37.69 | 75.37 | 1.436 | 1 | 0.2308 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | -2.0293 | -0.7493 | 1.2800 | 0.2568 | 4.985 | 0.0008 |
| last 20 years | 2000 | 2017 | -2.0293 | -0.7493 | 1.2800 | 0.2568 | 4.985 | 0.0008 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.4727 | 0.2200 | -0.7648 | 0.1553 | -4.925 | 0.9996 |
| EAC | 0.4727 | 1.7000 | 1.2799 | 0.1553 | 8.241 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
