CSEMP assessment of BD153 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 | 16.69 | 19.69 | -5.35 | 10.69 | | | |
| linear | 2 | 18.35 | 24.75 | -5.18 | 10.35 | 0.341 | 1 | 0.5590 |
| smooth (df = 2) | 3 | 19.20 | 31.70 | -4.60 | 9.20 | 1.148 | 1 | 0.2839 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -1.3463 | -1.6109 | -0.2646 | 0.4466 | -0.592 | 0.5722 |
| last 20 years | 2006 | 2018 | -1.3463 | -1.6109 | -0.2646 | 0.4466 | -0.592 | 0.5722 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.2 | 0.0 | -1.385 | 0.272 | -5.085 | 0.9993 |
| FEQG | 0.2 | 1100.0 | 8.614 | 0.272 | 31.633 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
