CSEMP assessment of CB101 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 | 101.73 | 103.02 | -47.86 | 95.73 | | | |
| linear | 2 | 102.20 | 104.66 | -47.10 | 94.20 | 1.531 | 1 | 0.2159 |
| smooth (df = 2) | 3 | 103.43 | 107.60 | -46.72 | 93.43 | 0.765 | 1 | 0.3817 |
| smooth (df = 3) | 4 | 103.29 | 109.84 | -45.65 | 91.29 | 2.140 | 1 | 0.1435 |
| smooth (df = 4) | 5 | 103.74 | 113.54 | -44.87 | 89.74 | 1.554 | 1 | 0.2125 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 1.1052 | 0.4443 | -0.6609 | 0.5288 | -1.250 | 0.2305 |
| last 20 years | 2000 | 2017 | 1.1052 | 0.4443 | -0.6609 | 0.5288 | -1.250 | 0.2305 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.5594 | 0.1400 | -2.4104 | 0.3410 | -7.068 | 1.0000 |
| EAC | 1.5594 | 3.0000 | 0.6543 | 0.3410 | 1.919 | 0.0371 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
