2017
DOI: 10.1590/s1413-41522017142739
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Estatística descritiva e estacionaridade em variáveis geoquímicas ambientais

Abstract: of soils and sediments collected in the field. We also determined the values of pH, salinity, total nitrogen, phosphorus, organic matter and particle size.Statistical analyzes, semivariogram development, ordinary kriging use and, lastly, cross validation were performed to measure the uncertainty of the previous measurement of data. It was found, in this work, by means of the variograms that although data were ordinary, they showed stationarity. In addition, the parameter of descriptive statistics that mostly c… Show more

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Cited by 2 publications
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“…R 2 (coefficient of determination), and the RSS (sum of squares of residues) were used as criteria for the crossvalidation. The best fit was reached when the correlation and determination coefficients were close to a value of 1, and there was an adjacent zero intercept and an adjacent angular coefficient of 1 (Assumpção & Hadlich, 2017). For RSS, smaller values correspond with better semivariogram models.…”
Section: Figure1mentioning
confidence: 95%
“…R 2 (coefficient of determination), and the RSS (sum of squares of residues) were used as criteria for the crossvalidation. The best fit was reached when the correlation and determination coefficients were close to a value of 1, and there was an adjacent zero intercept and an adjacent angular coefficient of 1 (Assumpção & Hadlich, 2017). For RSS, smaller values correspond with better semivariogram models.…”
Section: Figure1mentioning
confidence: 95%