CSEMP assessment of BDE47 in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 39.38 | 42.38 | -16.69 | 33.38 | | | |
| linear | 2 | 41.36 | 47.76 | -16.68 | 33.36 | 0.016 | 1 | 0.9005 |
| smooth (df = 2) | 3 | 41.02 | 53.52 | -15.51 | 31.02 | 2.346 | 1 | 0.1256 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2017 | -1.1613 | -1.1014 | 0.0599 | 0.4660 | 0.129 | 0.9013 |
| last 20 years | 2006 | 2017 | -1.1613 | -1.1014 | 0.0599 | 0.4660 | 0.129 | 0.9013 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.33 | 0.05 | -1.894 | 0.291 | -6.513 | 0.9998 |
| FEQG | 0.33 | 97.50 | 5.681 | 0.291 | 19.532 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
