CSEMP assessment of benzo[a]anthracene in sediment at inner (Firth of Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
|---|---|---|---|---|---|---|---|---|
| mean | 1 | 111.56 | 113.36 | -52.78 | 105.56 | |||
| linear | 2 | 111.46 | 115.01 | -51.73 | 103.46 | 2.107 | 1 | 0.1466 |
| smooth (df = 2) | 3 | 112.79 | 119.04 | -51.40 | 102.79 | 0.665 | 1 | 0.4146 |
| smooth (df = 3) | 4 | 113.27 | 123.56 | -50.64 | 101.27 | 1.517 | 1 | 0.2180 |
Change in log concentration
| Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
|---|---|---|---|---|---|---|---|---|
| overall | 2002 | 2018 | 5.023 | 5.797 | 0.7739 | 0.5109 | 1.515 | 0.1580 |
| last 20 years | 2002 | 2018 | 5.023 | 5.797 | 0.7739 | 0.5109 | 1.515 | 0.1580 |
Status assessment
| Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
|---|---|---|---|---|---|---|
| BAC | 329.3 | 16.0 | -3.0244 | 0.3115 | -9.709 | 1.0000 |
| ERL | 329.3 | 261.0 | -0.2324 | 0.3115 | -0.746 | 0.7644 |
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_(inner)_seSF, inner (Firth of Clyde)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Firth_of_Clyde_(inner)_seSF, inner (Firth of Clyde)
Determinand : Benzo[a]anthracene
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020