Chi2 Test. This test is used when we have categorical data for two independent variables and we want to see if there is any relationship between the variables. The degrees of freedom df.
Variables like height and distance can t be test objects via chi square. The numbers must be large enough. It s this distribution that tells us the probability of finding χ 2 23 57.
A chi squared test also written as χ 2 test is a statistical hypothesis test that is valid to perform when the test statistic is chi squared distributed under the null hypothesis specifically pearson s chi squared test and variants thereof.
Key takeaways a chi square χ2 statistic is a measure of the difference between the observed and expected frequencies of the. And chi is the greek letter χ so we can also write it χ2. Pearson s chi squared test. A chi squared test also written as χ 2 test is a statistical hypothesis test that is valid to perform when the test statistic is chi squared distributed under the null hypothesis specifically pearson s chi squared test and variants thereof.
