1974
DOI: 10.1016/0375-6742(74)90030-2
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Selection of threshold values in geochemical data using probability graphs

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Cited by 693 publications
(328 citation statements)
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“…CO2 effiux data for study area A were log-normally separated in three different overlapping populations (Sinclair, 1974 ground and weak steaming fumaroles occur. In contrast, relatively low soil CO2 efflux and ground temperatures were observed at the bottom of the main summit crater, which is partially filled by the 1995 lava flows that behave as an impermeable barrier for the gas flow.…”
Section: Resultsmentioning
confidence: 99%
“…CO2 effiux data for study area A were log-normally separated in three different overlapping populations (Sinclair, 1974 ground and weak steaming fumaroles occur. In contrast, relatively low soil CO2 efflux and ground temperatures were observed at the bottom of the main summit crater, which is partially filled by the 1995 lava flows that behave as an impermeable barrier for the gas flow.…”
Section: Resultsmentioning
confidence: 99%
“…(Table A1). The Table also reports single background, threshold and anomaly values, obtained following the graphical method of Sinclair (1974) recently applied by several authors (e.g., Hernandez et al, 2004;Carapezza et al, 2009;Padrón et al, 2013). Measurements were performed by using EPERM ® electretes.…”
Section: Discussionmentioning
confidence: 99%
“…Su tali dati è condotta l'analisi statistica con lo studio delle frequenze cumulate in scala di probabilità normale secondo il metodo di Sinclair (Sinclair 1974(Sinclair , 1976. Nel dettaglio, per l'analisi delle frequenze è stato utilizzato il software R e l'algoritmo hclust del cluster gerarchico, affiancato da una verifica della normalità delle popolazioni separate tramite i test di Shapiro-Wilk o Lilliefor; le classi ottenute hanno un numero variabile da tre a sei.…”
Section: Materiali E Metodiunclassified