Results 11 to 20 of about 7,093,858 (209)
Maximally selected chi-square statistics and binary splits of nominal variables [PDF]
, 2005 We address the problem of maximally selected chi-square statistics in the case of a binary Y variable and a nominal X variable with several categories. The distribution of the maximally selected chi-square statistic has already been derived when the best
Boulesteix, Anne-Laure
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Maximally selected chi-square statistics and umbrella orderings [PDF]
, 2006 Binary outcomes that depend on an ordinal predictor in a non-monotonic way are common in medical data analysis. Such patterns can be addressed in terms of cutpoints: for example, one looks for two cutpoints that define an interval in the range of the ...
Anne-laure Boulesteix +3 more
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Chi-square tests of the D2 distribution.
, 2023 Chi-square tests of the D2 distribution.
Lei Li (29537) +2 more
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Fitting a Chi-Square Curve to an Observed Frequency Distribution [PDF]
, 1951 10 pages, 1 article*Fitting a Chi-Square Curve to an Observed Frequency Distribution* (Federer, W.
Cornell University. Dept. of Biological Statistics and Computational Biology. +3 more
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Maximally selected chi-square statistics for at least ordinal scaled variables [PDF]
, 2005 The association between a binary variable Y and a variable X with an at least ordinal measurement scale might be examined by selecting a cutpoint in the range of X and then performing an association test for the obtained 2x2 contingency table using the ...
Boulesteix, Anne-Laure
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Latent-variable Approaches Utilizing Both Item Scores and Response Times To Detect Test Fraud
Open Education Studies, 2021 There is a growing interest in approaches based on latent-variable models for detecting fraudulent behavior on educational tests. Wollack and Schoenig (2018) noted the presence of five types of statistical/psychometric approaches to detect the three ...
Sinharay Sandip
doaj +1 more source
Approximation of CDF of Non-Central Chi-Square Distribution by Mean-Value Theorems for Integrals
Mathematics, 2021 The cumulative distribution function of the non-central chi-square distribution χn′2(λ) of n degrees of freedom possesses an integral representation. Here we rewrite this integral in terms of a lower incomplete gamma function applying two of the second ...
Árpád Baricz +2 more
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Birthdate quartile distribution, chi-square value and odds ratio analysis.
, 2023 Birthdate quartile distribution, chi-square value and odds ratio analysis.
Rocco Rinaldi (16612176) +5 more
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