CSEMP assessment of CB153 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 | 83.85 | 85.14 | -38.93 | 77.85 | | | |
| linear | 2 | 85.84 | 88.30 | -38.92 | 77.84 | 0.010 | 1 | 0.9205 |
| smooth (df = 2) | 3 | 86.98 | 91.15 | -38.49 | 76.98 | 0.859 | 1 | 0.3541 |
| smooth (df = 3) | 4 | 88.98 | 95.53 | -38.49 | 76.98 | 0.001 | 1 | 0.9811 |
| smooth (df = 4) | 5 | 90.40 | 100.20 | -38.20 | 76.40 | 0.587 | 1 | 0.4437 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 1.2456 | 1.2028 | -0.0429 | 0.4295 | -0.100 | 0.9218 |
| last 20 years | 2000 | 2017 | 1.2456 | 1.2028 | -0.0429 | 0.4295 | -0.100 | 0.9218 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 3.33 | 0.19 | -2.8635 | 0.2794 | -10.247 | 1.0000 |
| EAC | 3.33 | 40.00 | 2.4861 | 0.2794 | 8.897 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
