Chicago crimes. Part 4

Chicago crimes. Part 4 Alexander Levakov, Senior Research Fellow, Ph.D February, 2017

Contents Introduction

1

Research goal

1

Data

1

Contigency tables

2

Chi-squared test

3

Graphical interpretation

3

Conclusions

4

Introduction In the previous topics on crimes in Chicago we have explored dataset from gov.data and applied Pareto principle to select the most relevant types and locations of crimes in Chicago for estimation the difference in types of crimes and locations versus day of the week and month. See https://rpubs.com/alex-lev/248923, https://rpubs.com/alex-lev/249124, https://rpubs.com/alex-lev/249354.

Research goal Now we want to estimate criminal vilolence level in Chicago by comparing statistics for types of crimes to the crime locations.

Data For more about Chicago criminal data see https://catalog.data.gov/dataset/crimes-2001-to-present-398a4.

chicago_crime