CSEMP assessment of CB52 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 | 73.36 | 75.36 | -33.68 | 67.36 | | | |
| linear | 2 | 75.25 | 79.25 | -33.63 | 67.25 | 0.105 | 1 | 0.7453 |
| smooth (df = 2) | 3 | 74.33 | 81.47 | -32.16 | 64.33 | 2.924 | 1 | 0.0873 |
| smooth (df = 3) | 4 | 71.99 | 83.99 | -29.99 | 59.99 | 4.341 | 1 | 0.0372 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2013 | -0.3130 | -0.4287 | -0.1157 | 0.3561 | -0.325 | 0.7520 |
| last 20 years | 2000 | 2013 | -0.3130 | -0.4287 | -0.1157 | 0.3561 | -0.325 | 0.7520 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.6514 | 0.1200 | -1.6916 | 0.2036 | -8.307 | 1.0000 |
| EAC | 0.6514 | 2.7000 | 1.4219 | 0.2036 | 6.982 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
