CSEMP assessment of CB138 in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 81.89 | 83.09 | -37.94 | 75.89 | | | |
| linear | 2 | 83.43 | 85.72 | -37.72 | 75.43 | 0.454 | 1 | 0.5004 |
| smooth (df = 2) | 3 | 85.25 | 89.09 | -37.62 | 75.25 | 0.189 | 1 | 0.6634 |
| smooth (df = 3) | 4 | 87.13 | 93.13 | -37.57 | 75.13 | 0.114 | 1 | 0.7361 |
| smooth (df = 4) | 5 | 88.41 | 97.32 | -37.20 | 74.41 | 0.722 | 1 | 0.3955 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 1.0352 | 0.7667 | -0.2685 | 0.3973 | -0.676 | 0.5088 |
| last 20 years | 2000 | 2018 | 1.0352 | 0.7667 | -0.2685 | 0.3973 | -0.676 | 0.5088 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 2.153 | 0.150 | -2.6638 | 0.2598 | -10.251 | 1.0000 |
| EAC | 2.153 | 7.900 | 1.3002 | 0.2598 | 5.004 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
