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gptkbp:instanceOf
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statistical analysis
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gptkbp:alternativeTo
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gptkb:Fisher's_exact_test_for_small_samples
association between variables
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gptkbp:appliesTo
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contingency tables
frequency data
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gptkbp:assumes
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expected frequency at least 5
independent observations
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gptkbp:calculationMethod
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(observed-expected)²/expected
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gptkbp:category
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nonparametric test
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gptkbp:degreesOfFreedom
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(rows-1)*(columns-1) for independence test
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gptkbp:distribution
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gptkb:chi-squared_distribution
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gptkbp:field
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statistics
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https://www.w3.org/2000/01/rdf-schema#label
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chi-squared test
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gptkbp:introducedIn
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1900
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gptkbp:inventedBy
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gptkb:Karl_Pearson
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gptkbp:limitation
|
does not measure strength of association
not suitable for paired data
sensitive to small expected frequencies
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gptkbp:nullHypothesis
|
no association between variables
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gptkbp:relatedTo
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gptkb:Fisher's_exact_test
gptkb:G-test
gptkb:likelihood-ratio_test
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gptkbp:requires
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categorical data
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gptkbp:seeAlso
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gptkb:chi-squared_distribution
gptkb:G-test
gptkb:likelihood-ratio_test
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gptkbp:software
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gptkb:SPSS
gptkb:Excel
gptkb:Python_(scipy.stats)
R
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gptkbp:statistic
|
sum of squared standardized differences
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gptkbp:symbol
|
χ²
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gptkbp:type
|
gptkb:Pearson's_chi-squared_test
gptkb:Mantel-Haenszel_chi-squared_test
gptkb:Yates'_chi-squared_test
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gptkbp:usedFor
|
homogeneity
goodness of fit
testing independence
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gptkbp:bfsParent
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gptkb:Karl_Pearson
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gptkbp:bfsLayer
|
4
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