CSEMP assessment of CB28 in sediment at Skelmorlie (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 67.81 | 69.61 | -30.91 | 61.81 | | | |
| linear | 2 | 69.72 | 73.27 | -30.86 | 61.72 | 0.095 | 1 | 0.7582 |
| smooth (df = 2) | 3 | 71.59 | 77.84 | -30.80 | 61.59 | 0.124 | 1 | 0.7243 |
| smooth (df = 3) | 4 | 67.48 | 77.77 | -27.74 | 55.48 | 6.110 | 1 | 0.0134 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2013 | -0.01097 | -0.14082 | -0.1298 | 0.4209 | -0.309 | 0.7635 |
| last 20 years | 2000 | 2013 | -0.01097 | -0.14082 | -0.1298 | 0.4209 | -0.309 | 0.7635 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.8686 | 0.2200 | -1.3733 | 0.2513 | -5.465 | 0.9999 |
| EAC | 0.8686 | 1.7000 | 0.6714 | 0.2513 | 2.672 | 0.0109 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
