Category Archives: Class Notes

Social Disorganization Leads to Urban Crime?

The research on urban crime is generally of two types. There are studies that compare cities, seeking to understand why some have higher crime rates than others. And there are studies that focus on explaining variations in crime levels within … Continue reading

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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

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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

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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 decide! … Continue reading

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