CSEMP assessment of BD154 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 | 6.97 | 10.57 | -0.49 | 0.97 | | | |
| linear | 2 | 3.72 | 11.72 | 2.14 | -4.28 | 5.256 | 1 | 0.0219 |
| smooth (df = 2) | 3 | -1.61 | 15.06 | 5.80 | -11.61 | 7.327 | 1 | 0.0068 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -1.5843 | -2.2782 | -0.6939 | 0.2355 | -2.946 | 0.0257 |
| last 20 years | 2006 | 2018 | -1.5843 | -2.2782 | -0.6939 | 0.2355 | -2.946 | 0.0257 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.1 | 0.0 | -0.718 | 0.164 | -4.388 | 0.9977 |
| FEQG | 0.1 | 1100.0 | 9.281 | 0.164 | 56.764 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
