CSEMP assessment of BD183 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 | 32.17 | 35.17 | -13.09 | 26.17 | | | |
| linear | 2 | 34.09 | 40.49 | -13.04 | 26.09 | 0.083 | 1 | 0.7736 |
| smooth (df = 2) | 3 | 33.99 | 46.49 | -11.99 | 23.99 | 2.102 | 1 | 0.1471 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2006 | 2018 | -3.1186 | -2.9950 | 0.1236 | 0.4283 | 0.289 | 0.7813 |
| last 20 years | 2006 | 2018 | -3.1186 | -2.9950 | 0.1236 | 0.4283 | 0.289 | 0.7813 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0 | 0 | -0.001 | 0.260 | -0.003 | 0.5011 |
| FEQG | 0 | 14000 | 12.542 | 0.260 | 48.213 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
