Projects

CSEMP assessment of lead in biota at Grimsby Roads (Lower Humber)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean126.0629.66-10.0320.06
linear227.5635.56 -9.7819.560.497 10.4806
smooth (df = 2)328.9845.65 -9.4918.980.584 10.4449

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200220124.4824.6040.122030.172460.7080.5057
last 20 years200220124.4824.6040.122030.172460.7080.5057

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 99.9 26.0-1.3461 0.1115-12.0701.0000
EC 99.91500.0 2.7090 0.1115 24.290<0.0001

 


Related pages

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