CSEMP assessment of CB180 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 | 22.42 | 24.06 | -8.21 | 16.42 | | | |
| linear | 2 | 23.53 | 26.73 | -7.76 | 15.53 | 0.893 | 1 | 0.3448 |
| smooth (df = 2) | 3 | 21.39 | 26.94 | -5.69 | 11.39 | 4.138 | 1 | 0.0419 |
| smooth (df = 3) | 4 | 22.14 | 31.14 | -5.07 | 10.14 | 1.247 | 1 | 0.2641 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 1.1519 | 1.6290 | 0.4771 | 0.4950 | 0.964 | 0.3542 |
| last 20 years | 2000 | 2017 | 1.1519 | 1.6290 | 0.4771 | 0.4950 | 0.964 | 0.3542 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 5.099 | 0.100 | -3.932 | 0.320 | -12.269 | 1.0000 |
| EAC | 5.099 | 12.000 | 0.856 | 0.320 | 2.671 | 0.0102 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
