CSEMP assessment of BDE99 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 | 27.14 | 30.14 | -10.57 | 21.14 | | | |
| linear | 2 | 21.17 | 27.57 | -6.58 | 13.17 | 7.972 | 1 | 0.0048 |
| smooth (df = 2) | 3 | 14.41 | 26.91 | -2.20 | 4.41 | 8.763 | 1 | 0.0031 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -1.0320 | -2.1016 | -1.0696 | 0.2941 | -3.637 | 0.0109 |
| last 20 years | 2006 | 2018 | -1.0320 | -2.1016 | -1.0696 | 0.2941 | -3.637 | 0.0109 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.1223 | 0.0500 | -0.8941 | 0.2161 | -4.138 | 0.9970 |
| FEQG | 0.1223 | 1.0000 | 2.1016 | 0.2161 | 9.725 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
