CSEMP assessment of CB180 in sediment at Sea of Hebrides

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
linear2151.17155.17-71.58143.173.907 10.0481
smooth (df = 2)3153.15160.29-71.57143.150.020 10.8879
smooth (df = 3)4152.88164.88-70.44140.882.268 10.1321

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
last 20 years20072018-2.9597-2.08200.87770.40702.1560.0564

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 0.125 0.100-0.221 0.241-0.9150.8090
EAC 0.12512.000 4.567 0.24118.939<0.0001


Related pages

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