CSEMP assessment of CB118 in sediment at Hunterston (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 154.51 | 155.71 | -74.25 | 148.51 | |||
linear | 2 | 156.32 | 158.60 | -74.16 | 148.32 | 0.191 | 1 | 0.6618 |
smooth (df = 2) | 3 | 157.60 | 161.45 | -73.80 | 147.60 | 0.714 | 1 | 0.3981 |
smooth (df = 3) | 4 | 157.30 | 163.30 | -72.65 | 145.30 | 2.305 | 1 | 0.1290 |
smooth (df = 4) | 5 | 157.84 | 166.75 | -71.92 | 143.84 | 1.453 | 1 | 0.2280 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | -0.3336 | -0.5110 | -0.1774 | 0.4053 | -0.438 | 0.6675 |
last 20 years | 2000 | 2018 | -0.3336 | -0.5110 | -0.1774 | 0.4053 | -0.438 | 0.6675 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 0.5999 | 0.1700 | -1.2610 | 0.2271 | -5.552 | 1.0000 |
EAC | 0.5999 | 0.6000 | 0.0002 | 0.2271 | 0.001 | 0.4997 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
- Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
- Assessment methodology for chlorobiphenyls in sediment
- Accessment criteria for chlorobiphenyls in sediment
Media : Sediment (unsieved)
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : CB118
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_(Hunterston)_seSF, Hunterston (Clyde)
Determinand : CB118
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020