Tag: categorical data

Chi-Square

Chi-Square and 6 Important Assumptions of Chi Square

Posted onAuthorDr. Balaji NiwlikarLeave a comment

Introduction Chi-square (χ²) tests are among the most widely used non-parametric statistical methods for analyzing categorical data. They provide a versatile set of tools for testing hypotheses about frequencies in Read More …

stats

Point-Biserial, Phi Coefficient, Biserial, and Tetrachoric Correlation: 4 Important Types of Correlation

Posted onAuthorDr. Balaji NiwlikarLeave a comment

Introduction In psychological and educational research, not all variables are continuous. Many important variables — such as gender, pass/fail outcomes, yes/no responses, or item correctness — are dichotomous (i.e., having Read More …