CSEMP assessment of chrysene in sediment at Off Southend-on-sea (Thames)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 40.85 | 46.85 | -17.42 | 34.85 | | | |
| linear | 2 | 42.56 | 58.56 | -17.28 | 34.56 | 0.282 | 1 | 0.5954 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2005 | 2017 | 4.448 | 4.220 | -0.2285 | 0.4287 | -0.533 | 0.6223 |
| last 20 years | 2005 | 2017 | 4.448 | 4.220 | -0.2285 | 0.4287 | -0.533 | 0.6223 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 68 | 20 | -1.2239 | 0.3545 | -3.453 | 0.9870 |
| ERL | 68 | 384 | 1.7310 | 0.3545 | 4.883 | 0.0041 |
Raw data with supporting information
Raw data with assessment
Assessment plot
PAH (parent) data
da.jpg "PAH (parent) data for assessment of chrysene in sediment at Off Southend-on-sea (Thames)")
PAH (parent) assessment
as.jpg "PAH (parent) assessment of chrysene in sediment at Off Southend-on-sea (Thames)")
Related pages
