CSEMP assessment of CB52 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 | 66.42 | 68.22 | -30.21 | 60.42 | | | |
| linear | 2 | 68.34 | 71.89 | -30.17 | 60.34 | 0.085 | 1 | 0.7703 |
| smooth (df = 2) | 3 | 69.93 | 76.18 | -29.97 | 59.93 | 0.405 | 1 | 0.5245 |
| smooth (df = 3) | 4 | 71.89 | 82.18 | -29.95 | 59.89 | 0.041 | 1 | 0.8395 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 0.5044 | 0.2279 | -0.2765 | 0.9463 | -0.292 | 0.7756 |
| last 20 years | 2000 | 2018 | 0.5044 | 0.2279 | -0.2765 | 0.9463 | -0.292 | 0.7756 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.256 | 0.120 | -2.3482 | 0.5878 | -3.995 | 0.9989 |
| EAC | 1.256 | 2.700 | 0.7653 | 0.5878 | 1.302 | 0.1097 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
