| http://www.w3.org/ns/prov#value | - Additionally, the Kaiser???Meyer???Olkin method (KMO) showed that the measure of sampling adequacy (MSA) was 0.623, indicating that the degree of correlation among the variables and the appropriateness of factor analysis was middling.PCA considered the hydrochemical variables common to all 39 samples, including pH, TH, TDS, K+, Na+, Ca2+, Mg2+, HCO3???, SO42???, Cl???, NH4+, NO3??? and F???.
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