CSEMP assessment of CB52 in sediment at Inner Firth of Clyde, Nth of Cumbrae
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 32.13 | 35.73 | -13.07 | 26.13 | | | |
| linear | 2 | 34.13 | 42.13 | -13.07 | 26.13 | 0.003 | 1 | 0.9542 |
| smooth (df = 2) | 3 | 35.48 | 52.15 | -12.74 | 25.48 | 0.649 | 1 | 0.4204 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2013 | -0.26113 | -0.27515 | -0.01402 | 0.24444 | -0.057 | 0.9561 |
| last 20 years | 1999 | 2013 | -0.26113 | -0.27515 | -0.01402 | 0.24444 | -0.057 | 0.9561 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.7595 | 0.1200 | -1.8451 | 0.1655 | -11.146 | 1.0000 |
| EAC | 0.7595 | 2.7000 | 1.2684 | 0.1655 | 7.662 | 0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
