CSEMP assessment of CB153 in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 85.04 | 86.24 | -39.52 | 79.04 | | | |
| linear | 2 | 86.98 | 89.27 | -39.49 | 78.98 | 0.057 | 1 | 0.8115 |
| smooth (df = 2) | 3 | 88.54 | 92.39 | -39.27 | 78.54 | 0.441 | 1 | 0.5068 |
| smooth (df = 3) | 4 | 90.41 | 96.41 | -39.21 | 78.41 | 0.127 | 1 | 0.7212 |
| smooth (df = 4) | 5 | 91.59 | 100.50 | -38.80 | 77.59 | 0.822 | 1 | 0.3646 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 1.2610 | 1.1618 | -0.0992 | 0.4158 | -0.239 | 0.8144 |
| last 20 years | 2000 | 2018 | 1.2610 | 1.1618 | -0.0992 | 0.4158 | -0.239 | 0.8144 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 3.20 | 0.19 | -2.8225 | 0.2733 | -10.328 | 1.0000 |
| EAC | 3.20 | 40.00 | 2.5271 | 0.2733 | 9.247 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
