Projects

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

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean15.7910.290.11-0.21
linear27.7418.410.13-0.260.041 10.8386
smooth (df = 2)38.0933.090.95-1.911.653 10.1985

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200620162.71672.76990.053240.256530.2080.8438
last 20 years200620162.71672.76990.053240.256530.2080.8438

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC15.9638.000.86770.16655.2120.0017
ERL15.9647.001.08030.16656.4890.0006

 


Related pages

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