Projects

CSEMP assessment of lead in biota at Peterstone (Lower Severn)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean119.9722.97-6.9913.97
linear220.1626.56-6.0812.161.816 10.1778
smooth (df = 2)320.2332.73-5.1110.231.929 10.1649

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200120147.4086.809-0.5991 0.4223-1.4190.1989
last 20 years200120147.4086.809-0.5991 0.4223-1.4190.1989

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 906.2 211.9-1.4531 0.2616-5.5540.9996
EC 906.21500.0 0.5040 0.2616 1.9260.0477

 


Raw data with supporting information

Raw data with supporting information for assessment of  lead in biota at Peterstone (Lower Severn)


Raw data with assessment

Raw data with assessment of  lead in biota at Peterstone (Lower Severn)


Assessment plot

Assessment plot for  lead in biota at Peterstone (Lower Severn)


Metals data

Metals data for assessment of  lead in biota at Peterstone (Lower Severn)


Metals assessment

Metals assessment of  lead in biota at Peterstone (Lower Severn)


Related pages

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