CSEMP assessment of BD153 in biota at Tees Bay
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 55.16 | 59.66 | -24.58 | 49.16 | | | |
| linear | 2 | 40.06 | 50.73 | -16.03 | 32.06 | 17.100 | 1 | <0.0001 |
| smooth (df = 2) | 3 | 41.98 | 66.98 | -15.99 | 31.98 | 0.078 | 1 | 0.7805 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2017 | 0.6178 | -2.4882 | -3.1060 | 0.3994 | -7.776 | 0.0006 |
| last 20 years | 2003 | 2017 | 0.6178 | -2.4882 | -3.1060 | 0.3994 | -7.776 | 0.0006 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.083 | 0.012 | -1.935 | 0.237 | -8.179 | 0.9998 |
| FEQG | 0.083 | 4.000 | 3.874 | 0.237 | 16.380 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
