CSEMP assessment of CB180 in sediment at middle (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 99.78 | 101.78 | -46.89 | 93.78 | |||
| linear | 2 | 100.32 | 104.32 | -46.16 | 92.32 | 1.459 | 1 | 0.2271 |
| smooth (df = 2) | 3 | 99.44 | 106.59 | -44.72 | 89.44 | 2.877 | 1 | 0.0898 |
| smooth (df = 3) | 4 | 98.55 | 110.55 | -43.27 | 86.55 | 2.898 | 1 | 0.0887 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2007 | 2018 | -0.8896 | -0.5477 | 0.3419 | 0.2735 | 1.250 | 0.2396 |
| last 20 years | 2007 | 2018 | -0.8896 | -0.5477 | 0.3419 | 0.2735 | 1.250 | 0.2396 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 0.578 | 0.100 | -1.7549 | 0.1613 | -10.879 | 1.0000 |
| EAC | 0.578 | 12.000 | 3.0326 | 0.1613 | 18.800 | <0.0001 |
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for in sediment
- Accessment criteria for in sediment
Media : Sediment (unsieved)
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(middle)_seSF, middle (Firth of Clyde)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020