Projects

CSEMP assessment of pyrene in sediment at outer (Firth of Clyde)

Statistical analysis

Trend assessment

Analysis of variance

 DfAICAICcLog likDevianceChisqChi dfPr(>Chisq)
mean1107.40108.68-50.70101.40
linear2103.99106.45-47.99 95.99 5.411 10.0200
smooth (df = 2)3 92.94 97.11-41.47 82.9413.046 10.0003
smooth (df = 3)4 94.92101.47-41.46 82.92 0.020 10.8872
smooth (df = 4)5 96.06105.86-41.03 82.06 0.860 10.3537

Change in log concentration

 Year startYear endFit startFit endChangeStd errortPr(>|t|)
overall200020174.9044.272-0.6318 0.1890-3.3430.0048
last 20 years200020174.9044.272-0.6318 0.1890-3.3430.0048

Status assessment

 Conc fittedConc refLog ratioStd errortPr(>t)
BAC 71.6 24.0-1.0937 0.1590-6.8801.0000
ERL 71.6665.0 2.2280 0.159014.016<0.0001

 


Related pages

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