Pearson Chi2. For this example we will use a dataset called auto which contains information about 74 different automobiles from 1978. Chi squared more properly known as pearson s chi square test is a means of statistically evaluating data.
A chi square test of independence is used to determine whether or not there is a significant association between two categorical variables. This tutorial explains how to perform a chi square test of independence in stata. The number in brackets after pearson chi2 is the degrees of freedom for this test which is 4 in this case.
Chi2may not be specified if aweights or iweights are specified.
For this example we will use a dataset called auto which contains information about 74 different automobiles from 1978. It is used when categorical data from a sampling are being compared to expected or true results. Pearson s chi squared test displaystyle chi 2 is a statistical test applied to sets of categorical data to evaluate how likely it is that any observed difference between the sets arose by chance. Pearson s chi squared test is used to determine whether there is a statistically significant difference between the expected frequencies and the.
