Geochemical data in petrology can be successfully interpreted by using variousstatistical techniques. They can be used to process a large number of data more efficiently and to verify the results of mineralogical petrological examinations. In the case of Pohorje igneous rocks linear correlation , t-tests, analysis of variance and cluster analysis were applied. Correlation coefficients are connected with magma differentiation process. Cluster analysiand t-tests confirmed that only malchites differ geochemically from other considered igneous rocks. With analysis of variance inhomogeneity of granodiorite was established, which hindered to establish compositional trendsinside the massif.
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