CSEMP assessment of chrysene in sediment at Garroch Head (Clyde)
Statistical analysis
Trend assessment
Analysis of variance
| | Df | AIC | AICc | Log lik | Deviance | Chisq | Chi df | Pr(>Chisq) |
| mean | 1 | 80.03 | 81.23 | -37.02 | 74.03 | | | |
| linear | 2 | 73.65 | 75.94 | -32.83 | 65.65 | 8.380 | 1 | 0.0038 |
| smooth (df = 2) | 3 | 74.11 | 77.96 | -32.06 | 64.11 | 1.542 | 1 | 0.2143 |
| smooth (df = 3) | 4 | 75.71 | 81.71 | -31.85 | 63.71 | 0.403 | 1 | 0.5253 |
| smooth (df = 4) | 5 | 75.46 | 84.37 | -30.73 | 61.46 | 2.251 | 1 | 0.1335 |
Change in log concentration
| | Year start | Year end | Fit start | Fit end | Change | Std error | t | Pr(>|t|) |
| overall | 2000 | 2018 | 5.764 | 4.606 | -1.1577 | 0.3519 | -3.289 | 0.0046 |
| last 20 years | 2000 | 2018 | 5.764 | 4.606 | -1.1577 | 0.3519 | -3.289 | 0.0046 |
Status assessment
| | Conc fitted | Conc ref | Log ratio | Std error | t | Pr(>t) |
| BAC | 100.1 | 20.0 | -1.6102 | 0.2334 | -6.900 | 1.0000 |
| ERL | 100.1 | 384.0 | 1.3447 | 0.2334 | 5.762 | <0.0001 |
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 Garroch Head (Clyde)")
PAH (parent) assessment
as.jpg "PAH (parent) assessment of chrysene in sediment at Garroch Head (Clyde)")
Related pages
