CSEMP assessment of CB118 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 | 87.73 | 88.93 | -40.87 | 81.73 | | | |
| linear | 2 | 89.38 | 91.67 | -40.69 | 81.38 | 0.352 | 1 | 0.5528 |
| smooth (df = 2) | 3 | 90.62 | 94.47 | -40.31 | 80.62 | 0.759 | 1 | 0.3837 |
| smooth (df = 3) | 4 | 92.62 | 98.62 | -40.31 | 80.62 | 0.006 | 1 | 0.9374 |
| smooth (df = 4) | 5 | 93.64 | 102.54 | -39.82 | 79.64 | 0.980 | 1 | 0.3222 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 0.8180 | 0.5641 | -0.2539 | 0.4269 | -0.595 | 0.5603 |
| last 20 years | 2000 | 2018 | 0.8180 | 0.5641 | -0.2539 | 0.4269 | -0.595 | 0.5603 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.7578 | 0.1700 | -2.3360 | 0.2803 | -8.334 | 1.0000 |
| EAC | 1.7578 | 0.6000 | -1.0749 | 0.2803 | -3.835 | 0.9993 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
