by Margaret A. Townsend and Xiaodong Jian
Kansas Geological Survey, The University of Kansas
Kansas Geological Survey Open-file Report 93-1B
The personal computer package Statistical Package for the Social Sciences (SPSS), version 4.0 (1990) was used to evaluate water chemistry data from the Dakota study data base. As of 1988, the data base contained more than 900 complete and partial analyses. Of these, samples with complete analyses (major cations and anions: calcium, magnesium, sodium, chloride, sulfate, and bicarbonate) from 250 discrete locations were selected for evaluation. A subsample was used for ease in comparison of the several statistical methods used. At a future time, these methods will be tried on the entire Dakota water chemistry database.
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