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 | 40.27 | 42.84 | -17.14 | 34.27 | | | |
| linear | 2 | 42.10 | 47.43 | -17.05 | 34.10 | 0.176 | 1 | 0.6749 |
| smooth (df = 2) | 3 | 43.23 | 53.23 | -16.62 | 33.23 | 0.862 | 1 | 0.3532 |
| smooth (df = 3) | 4 | 43.30 | 61.30 | -15.65 | 31.30 | 1.933 | 1 | 0.1645 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -1.1875 | -0.9991 | 0.1884 | 0.4389 | 0.429 | 0.6791 |
| last 20 years | 2006 | 2018 | -1.1875 | -0.9991 | 0.1884 | 0.4389 | 0.429 | 0.6791 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.37 | 0.05 | -1.997 | 0.287 | -6.969 | 0.9999 |
| FEQG | 0.37 | 97.50 | 5.579 | 0.287 | 19.471 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
