CSEMP assessment of BD100 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 | 126.49 | 128.74 | -60.24 | 120.49 | | | |
| linear | 2 | 121.53 | 126.10 | -56.76 | 113.53 | 6.958 | 1 | 0.0083 |
| smooth (df = 2) | 3 | 115.28 | 123.61 | -52.64 | 105.28 | 8.251 | 1 | 0.0041 |
| smooth (df = 3) | 4 | 116.48 | 130.88 | -52.24 | 104.48 | 0.795 | 1 | 0.3727 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2003 | 2017 | 0.7537 | -1.4018 | -2.1555 | 0.4461 | -4.832 | 0.0013 |
| last 20 years | 2003 | 2017 | 0.7537 | -1.4018 | -2.1555 | 0.4461 | -4.832 | 0.0013 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.2462 | 0.0120 | -3.0211 | 0.3299 | -9.158 | 1.0000 |
| FEQG | 0.2462 | 1.0000 | 1.4018 | 0.3299 | 4.249 | 0.0014 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Organo-bromines data
Organo-bromines assessment
Related pages
