Statements (42)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
statistical analysis
|
| gptkbp:alternativeTo |
gptkb:Fisher's_exact_test
gptkb:G-test association between variables |
| gptkbp:appliesTo |
contingency tables
|
| gptkbp:assumes |
independent observations
sufficiently large sample size |
| gptkbp:basedOn |
chi-square distribution
|
| gptkbp:category |
non-parametric test
|
| gptkbp:degreesOfFreedom |
(number of categories - 1)
|
| https://www.w3.org/2000/01/rdf-schema#label |
Chi-Square Test
|
| gptkbp:introduced |
gptkb:Karl_Pearson
|
| gptkbp:introducedIn |
1900
|
| gptkbp:limitation |
not suitable for small sample sizes
not suitable for expected frequencies less than 5 |
| gptkbp:nullHypothesis |
no association between variables
|
| gptkbp:relatedTo |
gptkb:Fisher's_exact_test
gptkb:G-test gptkb:McNemar's_test |
| gptkbp:requires |
categorical data
expected frequencies observed frequencies |
| gptkbp:software |
gptkb:SAS
gptkb:SPSS gptkb:Python_(scipy.stats) R |
| gptkbp:statistic |
sum of squared differences between observed and expected frequencies divided by expected frequencies
|
| gptkbp:symbol |
χ²
|
| gptkbp:type |
Likelihood-ratio chi-square test
Mantel-Haenszel chi-square test Pearson's chi-square test Yates' chi-square test |
| gptkbp:usedFor |
testing independence
testing goodness of fit testing homogeneity |
| gptkbp:usedIn |
biostatistics
epidemiology genetics social sciences market research |
| gptkbp:bfsParent |
gptkb:Nonparametric_Statistical_Methods
|
| gptkbp:bfsLayer |
8
|