Pearson Chi Square Test. The chi square test is intended to test how likely it is that an observed distribution is due to chance. A pearson s chi square test also known as a chi square test is a statistical approach to determine if there is a difference between two or more groups of categorical variables.
What is the chi square test for. Expected counts in a goodness of fit test. Pearson s chi square test goodness of fit this is the currently selected item.
For example to see if the distribution of males and females differs between control and treated groups of an experiment requires a pearson s chi square test.
It is the most widely used of many chi squared tests e g yates likelihood ratio portmanteau test in time series etc statistical procedures whose results are evaluated by reference to the chi squared distribution. Chi square statistic for hypothesis testing. A chi square test is designed to analyze categorical data. What is the chi square test for.
