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Deskriptive Statistik : eine Einführung in Methoden und Anwendungen mit R und SPSS
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Calendar-based graphics for visualizing people's daily schedules
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A Graphical Method for Detecting Multivariate Outliers
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Comparing variances of correlated variables
Cohen, Ayala, (1986)
Testing and estimation of equal variances for correlated variables
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A method for hypothesis tests in polychotomous logistic regression
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