CSEMP assessment of CB52 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 | 90.62 | 92.00 | -42.31 | 84.62 | | | |
| linear | 2 | 91.92 | 94.59 | -41.96 | 83.92 | 0.694 | 1 | 0.4048 |
| smooth (df = 2) | 3 | 91.39 | 95.94 | -40.70 | 81.39 | 2.527 | 1 | 0.1119 |
| smooth (df = 3) | 4 | 92.43 | 99.63 | -40.22 | 80.43 | 0.965 | 1 | 0.3260 |
| smooth (df = 4) | 5 | 93.81 | 104.70 | -39.90 | 79.81 | 0.620 | 1 | 0.4309 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 0.6931 | 0.2582 | -0.4348 | 0.5198 | -0.836 | 0.4169 |
| last 20 years | 2000 | 2017 | 0.6931 | 0.2582 | -0.4348 | 0.5198 | -0.836 | 0.4169 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.2946 | 0.1200 | -2.3785 | 0.3263 | -7.289 | 1.0000 |
| EAC | 1.2946 | 2.7000 | 0.7350 | 0.3263 | 2.252 | 0.0204 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
