CSEMP assessment of CB153 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 | 156.98 | 159.23 | -75.49 | 150.98 | | | |
| linear | 2 | 154.12 | 158.69 | -73.06 | 146.12 | 4.863 | 1 | 0.0274 |
| smooth (df = 2) | 3 | 154.61 | 162.94 | -72.30 | 144.61 | 1.508 | 1 | 0.2195 |
| smooth (df = 3) | 4 | 156.53 | 170.93 | -72.27 | 144.53 | 0.077 | 1 | 0.7814 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2007 | 2017 | -1.8349 | -1.0880 | 0.7469 | 0.3170 | 2.356 | 0.0429 |
| last 20 years | 2007 | 2017 | -1.8349 | -1.0880 | 0.7469 | 0.3170 | 2.356 | 0.0429 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.34 | 0.19 | -0.573 | 0.193 | -2.967 | 0.9921 |
| EAC | 0.34 | 40.00 | 4.777 | 0.193 | 24.746 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
