Chi
The Chi-squared (χ²) test is a non-parametric statistical hypothesis test used to determine if there is a significant association between two categorical variables or if an observed frequency distribution differs significantly from an expected distribution. The Chi-squared distribution is a…
Key facts
- First appeared
- 1900
- Category
- web_framework
- Problem solved
- To provide a rigorous, quantifiable method for assessing the 'goodness of fit' between observed categorical data and a theoretical model, or to test for independence between two categorical variables, problems for which prior methods were often ad-hoc or lacked formal statistical grounding.
- Platforms
- Scientific Research, Statistical Software (e.g., R, Python's SciPy, SPSS, SAS, Stata), Quality Control, Social Sciences, Market Research, Biology and Medicine
Related technologies
Notable users
- Academic Researchers (universities worldwide)
- Biostatisticians
- Data Scientists
- Market Research Analysts
- Quality Assurance Engineers