CSEMP assessment of CB138 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 | 22.90 | 24.40 | -8.45 | 16.90 | | | |
| linear | 2 | 24.66 | 27.57 | -8.33 | 16.66 | 0.243 | 1 | 0.6218 |
| smooth (df = 2) | 3 | 25.49 | 30.49 | -7.74 | 15.49 | 1.167 | 1 | 0.2799 |
| smooth (df = 3) | 4 | 27.36 | 35.36 | -7.68 | 15.36 | 0.131 | 1 | 0.7175 |
| smooth (df = 4) | 5 | 27.90 | 40.15 | -6.95 | 13.90 | 1.462 | 1 | 0.2266 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 1.4417 | 1.2190 | -0.2227 | 0.4500 | -0.495 | 0.6289 |
| last 20 years | 2000 | 2018 | 1.4417 | 1.2190 | -0.2227 | 0.4500 | -0.495 | 0.6289 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 3.384 | 0.150 | -3.1161 | 0.2861 | -10.892 | 1.0000 |
| EAC | 3.384 | 7.900 | 0.8479 | 0.2861 | 2.964 | 0.0055 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
