CSEMP assessment of CB118 in sediment at Holy Loch (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) | |
---|---|---|---|---|---|---|---|---|
mean | 1 | 68.13 | 69.77 | -31.07 | 62.13 | |||
linear | 2 | 68.98 | 72.18 | -30.49 | 60.98 | 1.150 | 1 | 0.2835 |
smooth (df = 2) | 3 | 70.98 | 76.53 | -30.49 | 60.98 | 0.006 | 1 | 0.9368 |
smooth (df = 3) | 4 | 72.91 | 81.91 | -30.45 | 60.91 | 0.070 | 1 | 0.7913 |
Change in log concentration
Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) | |
---|---|---|---|---|---|---|---|---|
overall | 2000 | 2018 | 1.2437 | 0.0763 | -1.1674 | 1.0757 | -1.085 | 0.2991 |
last 20 years | 2000 | 2018 | 1.2437 | 0.0763 | -1.1674 | 1.0757 | -1.085 | 0.2991 |
Status assessment
Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) | |
---|---|---|---|---|---|---|
BAC | 1.0793 | 0.1700 | -1.8482 | 0.6821 | -2.710 | 0.9905 |
EAC | 1.0793 | 0.6000 | -0.5871 | 0.6821 | -0.861 | 0.7969 |
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_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : CB118
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020
Station : Clyde_FirthCInnerDunoon_se06, Holy Loch (Clyde)
Determinand : CB118
Units : μg kg-1 dry weight normalised to 2.5% organic carbon
Data extraction : 30 April 2020