CSEMP assessment of chrysene in sediment at SE of Bressay (Shetland)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean189.13 93.63-41.5783.13
linear290.23100.90-41.1182.230.901 10.3424
smooth (df = 2)392.15117.15-41.0782.150.084 10.7722

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200620162.44341.8351-0.6083 0.6362-0.9560.3829
last 20 years200620162.44341.8351-0.6083 0.6362-0.9560.3829

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 6.3 20.01.1610.406 2.8590.0177
ERL 6.3384.04.1160.40610.137<0.0001


Related pages

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