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 | 153.07 | 155.07 | -73.54 | 147.07 | |||
| linear | 2 | 151.17 | 155.17 | -71.58 | 143.17 | 3.907 | 1 | 0.0481 |
| smooth (df = 2) | 3 | 153.15 | 160.29 | -71.57 | 143.15 | 0.020 | 1 | 0.8879 |
| smooth (df = 3) | 4 | 152.88 | 164.88 | -70.44 | 140.88 | 2.268 | 1 | 0.1321 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2007 | 2018 | -2.9597 | -2.0820 | 0.8777 | 0.4070 | 2.156 | 0.0564 |
| last 20 years | 2007 | 2018 | -2.9597 | -2.0820 | 0.8777 | 0.4070 | 2.156 | 0.0564 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 0.125 | 0.100 | -0.221 | 0.241 | -0.915 | 0.8090 |
| EAC | 0.125 | 12.000 | 4.567 | 0.241 | 18.939 | <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 : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : MinchMalin_SeaOfHebrides_se01 (Sea of Hebrides)
Determinand : CB180
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020