Considering the regionalized variable of samples of grades of copper from 15 observation points taken around the Dilla area only in one direction (isotropy) in space. Then the data is presented on the table below. You are required to compute by hand the value of an empirical variogram at a distance (h) of 50, 100, 150…..300. At the end present your variogram using a graph and give your discussion and conclusion about the trend. Determine the Nugget, range, and sill of your plot.
xi = 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
z(xi)= 28 25 27 25 21 25 11 16 11 17 27 26 25 26 11