CSEMP assessment of CB28 in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 30.86 | 32.36 | -12.43 | 24.86 | | | |
| linear | 2 | 32.41 | 35.32 | -12.20 | 24.41 | 0.453 | 1 | 0.5010 |
| smooth (df = 2) | 3 | 33.29 | 38.29 | -11.65 | 23.29 | 1.116 | 1 | 0.2908 |
| smooth (df = 3) | 4 | 35.29 | 43.29 | -11.64 | 23.29 | 0.004 | 1 | 0.9485 |
| smooth (df = 4) | 5 | 34.59 | 46.84 | -10.30 | 20.59 | 2.698 | 1 | 0.1005 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 0.4368 | 0.7741 | 0.3373 | 0.4970 | 0.679 | 0.5093 |
| last 20 years | 2000 | 2018 | 0.4368 | 0.7741 | 0.3373 | 0.4970 | 0.679 | 0.5093 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 2.1686 | 0.2200 | -2.2882 | 0.3156 | -7.249 | 1.0000 |
| EAC | 2.1686 | 1.7000 | -0.2435 | 0.3156 | -0.771 | 0.7729 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
