CSEMP assessment of CB153 in sediment at North Minch
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 77.49 | 80.06 | -35.74 | 71.49 | | | |
| linear | 2 | 77.75 | 83.08 | -34.87 | 69.75 | 1.741 | 1 | 0.1870 |
| smooth (df = 2) | 3 | 79.75 | 89.75 | -34.87 | 69.75 | 0.000 | 1 | 0.9895 |
| smooth (df = 3) | 4 | 75.29 | 93.29 | -31.64 | 63.29 | 6.457 | 1 | 0.0110 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 1999 | 2018 | -1.0667 | -1.6913 | -0.6246 | 0.4784 | -1.306 | 0.2280 |
| last 20 years | 1999 | 2018 | -1.0667 | -1.6913 | -0.6246 | 0.4784 | -1.306 | 0.2280 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 0.18 | 0.19 | 0.031 | 0.343 | 0.089 | 0.4656 |
| EAC | 0.18 | 40.00 | 5.380 | 0.343 | 15.685 | <0.0001 |
Raw data with supporting information
Raw data with assessment
Assessment plot
Chlorobiphenyls data
Chlorobiphenyls assessment
Related pages
