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Geostatistic job to learn a number of existing statistical test questions along the one-dimensional distribution of geological exploration (drilling and grooving in two ways) sampling data in an Access , each sample are iron, copper, sulfur, three elements are stored laboratory grade, assuming the same length of each sample. Optional sampling data the two projects, complete the following tasks: 1. In half of the total length of the selected works for the maximum lag of two elements were calculated the experimental variograms grade value (optional iron, copper, sulfur, two), and provides source code (30+10 points) 2. Select spherical variogram model fitting theoretical models (intended to be provided with direct graphical lawful), and provide the source code (30+10 points) 3. Were compared to analyze variation of the same elements of the two elements of different projects in the same grade and quality of the project. (20 points)