CSEMP assessment of CB180 in sediment at Sea of Hebrides
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 145.22 | 147.47 | -69.61 | 139.22 | | | |
| linear | 2 | 140.77 | 145.34 | -66.39 | 132.77 | 6.452 | 1 | 0.0111 |
| smooth (df = 2) | 3 | 141.49 | 149.83 | -65.75 | 131.49 | 1.279 | 1 | 0.2581 |
| smooth (df = 3) | 4 | 143.05 | 157.45 | -65.52 | 131.05 | 0.445 | 1 | 0.5048 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2007 | 2017 | -3.0685 | -1.9179 | 1.1506 | 0.3747 | 3.071 | 0.0133 |
| last 20 years | 2007 | 2017 | -3.0685 | -1.9179 | 1.1506 | 0.3747 | 3.071 | 0.0133 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.147 | 0.100 | -0.385 | 0.223 | -1.725 | 0.9407 |
| EAC | 0.147 | 12.000 | 4.403 | 0.223 | 19.749 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
