CSEMP assessment of CB118 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 | 65.58 | 67.38 | -29.79 | 59.58 | | | |
| linear | 2 | 66.49 | 70.05 | -29.25 | 58.49 | 1.085 | 1 | 0.2975 |
| smooth (df = 2) | 3 | 68.49 | 74.74 | -29.24 | 58.49 | 0.005 | 1 | 0.9426 |
| smooth (df = 3) | 4 | 70.47 | 80.76 | -29.23 | 58.47 | 0.019 | 1 | 0.8909 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 1.2875 | 0.0275 | -1.2600 | 1.1991 | -1.051 | 0.3159 |
| last 20 years | 2000 | 2017 | 1.2875 | 0.0275 | -1.2600 | 1.1991 | -1.051 | 0.3159 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.0279 | 0.1700 | -1.7994 | 0.7702 | -2.336 | 0.9803 |
| EAC | 1.0279 | 0.6000 | -0.5383 | 0.7702 | -0.699 | 0.7504 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
