Projects

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

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean119.0123.51-6.5013.01
linear219.9630.63-5.9811.961.046 10.3064
smooth (df = 2)314.9439.94-2.47 4.947.021 10.0081

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200620163.3983.178-0.21996 0.21429-1.0260.3517
last 20 years200620163.3983.178-0.21996 0.21429-1.0260.3517

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 241221.62600.139311.670<0.0001
ERL 241501.83260.139313.153<0.0001

 


Related pages

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