CSEMP assessment of CB28 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 | 28.86 | 30.50 | -11.43 | 22.86 | | | |
| linear | 2 | 29.01 | 32.21 | -10.50 | 21.01 | 1.858 | 1 | 0.1728 |
| smooth (df = 2) | 3 | 25.13 | 30.69 | -7.57 | 15.13 | 5.874 | 1 | 0.0154 |
| smooth (df = 3) | 4 | 24.81 | 33.81 | -6.41 | 12.81 | 2.320 | 1 | 0.1277 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 0.3245 | 1.0339 | 0.7093 | 0.5021 | 1.413 | 0.1831 |
| last 20 years | 2000 | 2017 | 0.3245 | 1.0339 | 0.7093 | 0.5021 | 1.413 | 0.1831 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 2.8119 | 0.2200 | -2.5480 | 0.3231 | -7.886 | 1.0000 |
| EAC | 2.8119 | 1.7000 | -0.5032 | 0.3231 | -1.558 | 0.9273 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
