Chi-Square Test

A statistical test (pronounced "KYE square") used for analyzing two or more discrete (a.k.a. attribute or categorical) values. The test compares the actual frequency/proportion of observations to an expected frequency/proportion of those observations. The two basic types of this test are the Goodness-Of-Fit Test (One Variable) and the Association Test (Two Way Table).
Related StatStuff Video: 
   -Section 6-Analyze Phase, Lesson #15 - Hypothesis Testing: Proportions (Compare 2+ Factors)