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 | 93.52 | 95.52 | -43.76 | 87.52 | | | |
| linear | 2 | 90.80 | 94.80 | -41.40 | 82.80 | 4.715 | 1 | 0.0299 |
| smooth (df = 2) | 3 | 86.67 | 93.81 | -38.33 | 76.67 | 6.132 | 1 | 0.0133 |
| smooth (df = 3) | 4 | 83.95 | 95.95 | -35.97 | 71.95 | 4.722 | 1 | 0.0298 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | -1.5144 | -0.6483 | 0.8661 | 0.2712 | 3.194 | 0.0109 |
| last 20 years | 2000 | 2017 | -1.5144 | -0.6483 | 0.8661 | 0.2712 | 3.194 | 0.0109 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.523 | 0.100 | -1.6543 | 0.1631 | -10.140 | 1.0000 |
| EAC | 0.523 | 12.000 | 3.1332 | 0.1631 | 19.205 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
