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 | 13.28 | 16.88 | -3.64 | 7.28 | | | |
| linear | 2 | 13.00 | 21.00 | -2.50 | 5.00 | 2.278 | 1 | 0.1312 |
| smooth (df = 2) | 3 | 13.99 | 30.66 | -2.00 | 3.99 | 1.005 | 1 | 0.3162 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | -0.0679 | -0.7243 | -0.6564 | 0.3703 | -1.772 | 0.1267 |
| last 20 years | 2006 | 2017 | -0.0679 | -0.7243 | -0.6564 | 0.3703 | -1.772 | 0.1267 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.48 | 0.05 | -2.271 | 0.236 | -9.626 | 1.0000 |
| FEQG | 0.48 | 97.50 | 5.304 | 0.236 | 22.478 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
