CSEMP assessment of benzo[a]pyrene in sediment at SE of Bressay (Shetland)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean183.65 88.15-38.8377.65
linear285.62 96.29-38.8177.620.033 10.8568
smooth (df = 2)387.55112.55-38.7777.550.071 10.7899

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200620162.39932.2926-0.1067 0.5912-0.1800.8639
last 20 years200620162.39932.2926-0.1067 0.5912-0.1800.8639

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 9.9 30.01.1090.3772.9380.0162
ERL 9.9430.03.7710.3779.993<0.0001


Related pages

  • Clean Seas Environment Monitoring Programme (CSEMP) accessment viewer tool
  • Assessment methodology for in sediment
  • Accessment criteria for in sediment