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Case Study Case studies are the most popular qualitative methods of data analysis. A case study method focuses on the in depth study of a single, usually complex series of events, that make up a case.
A second family of interpolation methods consists of geostatistical methods, such as kriging, which are based on statistical models that include autocorrelationâthat is, the statistical relationships among the measured points.he IDW (inverse distance weighted) and Spline interpolation tools are referred to as deterministic interpolation methods because they are directly based on the surrounding measured values or on specified mathematical formulas that determine the smoothness of the resulting surface.