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Category Archives: Geography Practicals/Lab and Statistical Techniques
Graphical Representation of the Gini Index is Lorenz Curve
The Gini index or Gini coefficient is a statistical measure of distribution which was developed by the Italian statistician Corrado Gini in 1912. It is used as a gauge of economic inequality, measuring income distribution among a population. The coefficient … Continue reading
Correlation : A Bivariate Analysis
Correlation is a bivariate analysis that measures the strength of association between two variables and the direction of the relationship. In terms of the strength of relationship, the value of the correlation coefficient varies between +1 and -1. A value of … Continue reading
Chi-Square Test Example
You research two groups and put them in categories single, married or divorced: The numbers are definitely different, but … Is that just random chance? Or have you found something interesting? The Chi-Square Test gives a “p” value to help you … Continue reading
Conical Projections
Four well-known normal conical projections are the Lambert conformal conic projection, the simple conic projection, the Albers equal-area projection and the Polyconic projection. They give useful maps of mid-latitudes for countries which have no great extent in latitude. 1.Lambert conformal conic projection: The Lambert conformal conic projection is confomal. The … Continue reading