145,052 research outputs found

    Personal Papers (MS 80-0002)

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    Letter from M. Lehmann, Inc. to D. W. Kempner discussing about the Cinzano shipment requested

    Parameters behind "nonparametric" statistics: Kendall's tau,Somers' D and median differences

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    So-called "nonparametric" statistical methods are often in fact based on population parameters, which can be estimated (with confidence limits) using the corresponding sample statistics. This article reviews the uses of three such parameters, namely Kendall's tau, Somers' D and the Hodges-Lehmann median difference. Confidence intervals for these are demonstrated using the somersd package. It is argued that confidence limits for these parameters, and their differences,are more informative than the traditional practice of reporting only p-values. These three parameters are also important in defining other tests and parameters, such as the Wilcoxon test, the area under the receiver operating characteristic (ROC) curve, Harrell's C, and the Theil median slope. Copyright 2002 by Stata Corporation.confidence intervals, Gehan test, Harrell's C , Hodges-Lehmann median difference, Kendall's tau, nonparametric methods, rank correlation, rank-sum test, ROC area, Somers' D, Theil median slope, Wilcoxon test

    D. Lehmann, Development Theory, four critical studies

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    Étienne Gilbert. D. Lehmann, Development Theory, four critical studies. In: Tiers-Monde, tome 21, n°81, 1980. L'économie mondiale en 1980 : Vers l'éclatement du système centre-périphérie, sous la direction de Moïses Ikonicoff. p. 206

    H. Lehmann, Deutsches Familienrecht, 4° éd. révisée par D. Henrich

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    H. Lehmann, Deutsches Familienrecht, 4° éd. révisée par D. Henrich. In: Revue internationale de droit comparé. Vol. 19 N°4, Octobre-décembre 1967. p. 1018

    H. Lehmann, Deutsches Familienrecht, 4° éd. révisée par D. Henrich

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    H. Lehmann, Deutsches Familienrecht, 4° éd. révisée par D. Henrich. In: Revue internationale de droit comparé. Vol. 19 N°4, Octobre-décembre 1967. p. 1018

    Lehmann Cave; Baker, Nevada

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    Lehmann Cave; Baker, NevadaPhotograph

    C. Aldred, Egypt : The Amarna Period and the end of the eighteenth dynasty (Cambridge Ancient History, vol. II, chap, XIX, fasc. 71), 1971

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    Lehmann D. C. Aldred, Egypt : The Amarna Period and the end of the eighteenth dynasty (Cambridge Ancient History, vol. II, chap, XIX, fasc. 71), 1971. In: Revue des Études Anciennes. Tome 73, 1971, n°3-4. pp. 442-443
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