CSEMP assessment of BDE47 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 | 13.21 | 16.21 | -3.60 | 7.21 | | | |
| linear | 2 | 13.56 | 19.96 | -2.78 | 5.56 | 1.653 | 1 | 0.1986 |
| smooth (df = 2) | 3 | 15.40 | 27.90 | -2.70 | 5.40 | 0.151 | 1 | 0.6974 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -0.1353 | -0.6223 | -0.4870 | 0.3362 | -1.448 | 0.1907 |
| last 20 years | 2006 | 2018 | -0.1353 | -0.6223 | -0.4870 | 0.3362 | -1.448 | 0.1907 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.54 | 0.05 | -2.373 | 0.211 | -11.259 | 1.0000 |
| FEQG | 0.54 | 97.50 | 5.202 | 0.211 | 24.678 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
