CSEMP assessment of CB52 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 | 64.28 | 66.28 | -29.14 | 58.28 | | | |
| linear | 2 | 66.12 | 70.12 | -29.06 | 58.12 | 0.158 | 1 | 0.6909 |
| smooth (df = 2) | 3 | 67.86 | 75.00 | -28.93 | 57.86 | 0.260 | 1 | 0.6101 |
| smooth (df = 3) | 4 | 69.83 | 81.83 | -28.92 | 57.83 | 0.031 | 1 | 0.8611 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2017 | 0.5505 | 0.1307 | -0.4198 | 1.0560 | -0.398 | 0.6993 |
| last 20 years | 2000 | 2017 | 0.5505 | 0.1307 | -0.4198 | 1.0560 | -0.398 | 0.6993 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 1.1397 | 0.1200 | -2.2510 | 0.6658 | -3.381 | 0.9965 |
| EAC | 1.1397 | 2.7000 | 0.8625 | 0.6658 | 1.295 | 0.1121 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
