All Stories

  1. On Order Restricted Inference in Multi‐Step Stage Life Testing for a General Family of Distributions

    Article • Naval Research Logistics (NRL), December 2025, Wiley

    Professor Erhard Cramer

  2. Exact inference for the parameter of the exponential distribution based on type-I censored stage life testing data

    Article • Journal of Statistical Computation and Simulation, December 2025, Taylor & Francis

    Professor Erhard Cramer

  3. Elementare Geometrie und Trigonometrie

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  4. Elementare Rechenoperationen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  5. Folgen und Reihen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  6. Funktionen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  7. Gleichungen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  8. Grenzwerte, Stetigkeit, Differenziation

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  9. Grundlagen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  10. Integration

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  11. Mengen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  12. Optimierung

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  13. Polynome und Polynomgleichungen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  14. Summen- und Produktzeichen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  15. Ungleichungen

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  16. Vorkurs Mathematik

    Article • January 2025, Springer Science + Business Media

    Professor Erhard Cramer

  17. Modeling Failure Risks in Load-Sharing Systems With Heterogeneous Components

    Article • IEEE Transactions on Reliability, September 2024, Institute of Electrical & Electronics Engineers (IEEE)

    Professor Erhard Cramer

  18. Structure of hybrid censoring schemes and its implications

    Article • Metrika, April 2024, Springer Science + Business Media

    Professor Erhard Cramer

  19. Inference for Type-I and Type-II Hybrid Censored Minimal Repair and Record Data

    Article • Journal of Statistical Theory and Practice, November 2023, Springer Science + Business Media

    Professor Erhard Cramer

  20. Generalized Ng–Kundu–Chan model of adaptive progressive Type‐II censoring and related inference

    Article • Naval Research Logistics (NRL), October 2023, Wiley

    Professor Erhard Cramer

  21. Reliability inference with extended sequential order statistics

    Article • Applied Stochastic Models in Business and Industry, April 2023, Wiley

    Professor Erhard Cramer

  22. Hybrid Censoring: Models, Methods and Applications

    Article • January 2023, Elsevier

    Professor Erhard Cramer

  23. Ordered and censored lifetime data in reliability: An illustrative review

    Article • Wiley Interdisciplinary Reviews Computational Statistics, September 2021, Wiley

    Professor Erhard Cramer

  24. Exact Likelihood Inference for an Exponential Parameter under a Multi-Sample Type-II Progressive Hybrid Censoring Model

    Article • American Journal of Mathematical and Management Sciences, April 2021, Taylor & Francis

    Professor Erhard Cramer

  25. Some new results on likelihood ratio ordering and aging properties of generalized order statistics

    Article • Communication in Statistics- Theory and Methods, September 2020, Taylor & Francis

    Professor Erhard Cramer

  26. Stage life testing with random stage changing times

    Article • Communication in Statistics- Theory and Methods, September 2020, Taylor & Francis

    Professor Erhard Cramer

  27. k ‐step Stage Life Testing

    Article • Statistica Neerlandica, August 2020, Wiley

    Professor Erhard Cramer

  28. EM algorithms for ordered and censored system lifetime data under a proportional hazard rate model

    Article • Journal of Statistical Computation and Simulation, August 2020, Taylor & Francis

    Professor Erhard Cramer

  29. Multi-sample progressive Type-I censoring of exponentially distributed lifetimes

    Article • Communication in Statistics- Theory and Methods, February 2020, Taylor & Francis

    Professor Erhard Cramer

  30. Stage life testing

    Article • Naval Research Logistics (NRL), November 2019, Wiley

    Professor Erhard Cramer

  31. On the power of goodness-of-fit tests for the exponential distribution under progressive Type-II censoring

    Article • Journal of Statistical Computation and Simulation, August 2019, Taylor & Francis

    Professor Erhard Cramer

  32. Type-I hybrid censoring of multiple samples

    Article • Journal of Computational and Applied Mathematics, August 2019, Elsevier

    Professor Erhard Cramer

  33. A volume based approach to establish B-spline based expressions for density functions and its application to progressive hybrid censoring

    Article • Journal of the Korean Statistical Society, May 2019, Elsevier

    Professor Erhard Cramer

  34. Progressive censoring with fixed censoring times

    Article • Statistics, February 2019, Taylor & Francis

    Professor Erhard Cramer

  35. On Exact Inferential Results for a Simple Step-Stress Model Under a Time Constraint

    Article • Sankhya B, January 2019, Springer Science + Business Media

    Professor Erhard Cramer

  36. Stochastic monotonicity of MLEs of the mean for exponentially distributed lifetimes under hybrid censoring

    Article • Statistics & Probability Letters, December 2018, Elsevier

    Professor Erhard Cramer

  37. Exact Inference for a New Flexible Hybrid Censoring Scheme

    Article • Journal of the Indian Society for Probability and Statistics, February 2018, Springer Science + Business Media

    Professor Erhard Cramer

  38. Type-I hybrid censoring of uniformly distributed lifetimes

    Article • Communication in Statistics- Theory and Methods, January 2018, Taylor & Francis

    Professor Erhard Cramer

  39. Modularization of hybrid censoring schemes and its application to unified progressive hybrid censoring

    Article • Metrika, December 2017, Springer Science + Business Media

    Professor Erhard Cramer

  40. Inference with progressively censored k-out-of-n system lifetime data

    Article • Test, October 2017, Springer Science + Business Media

    Professor Erhard Cramer

  41. Restricted optimal progressive censoring

    Article • Communications in Statistics - Simulation and Computation, March 2017, Taylor & Francis

    Professor Erhard Cramer

  42. From B-spline representations to gamma representations in hybrid censoring

    Article • Statistical Papers, January 2017, Springer Science + Business Media

    Professor Erhard Cramer

  43. The progressive censoring signature of coherent systems

    Article • Applied Stochastic Models in Business and Industry, July 2016, Wiley

    Professor Erhard Cramer

  44. Sequential Order Statistics

    Article • May 2016, Wiley

    Professor Erhard Cramer

  45. Exact likelihood inference for exponential distributions under generalized progressive hybrid censoring schemes

    Article • Statistical Methodology, March 2016, Elsevier

    Professor Erhard Cramer

  46. Progressive Type-II censoring and coherent systems

    Article • Naval Research Logistics (NRL), September 2015, Wiley

    Professor Erhard Cramer

  47. Discrete strong unimodality of order statistics

    Article • Statistics & Probability Letters, August 2015, Elsevier

    Professor Erhard Cramer

  48. Mathematik für Ökonomen

    Article • January 2015, De Gruyter

    Professor Erhard Cramer

  49. Vorkurs Mathematik

    Article • January 2015, Springer Science + Business Media

    Professor Erhard Cramer

  50. Likelihood Inference for the Lifetime Performance Index under Progressive Type-II Censoring

    Article • Economic Quality Control, January 2015, De Gruyter

    Professor Erhard Cramer

  51. On a Correction of the Scale MLE for a Two-Parameter Exponential Distribution Under Progressive Type-I Censoring

    Article • Communication in Statistics- Theory and Methods, September 2014, Taylor & Francis

    Professor Erhard Cramer

  52. Sequential Order Statistics

    Article • September 2014, Wiley

    Professor Erhard Cramer

  53. Using linear interpolation to reduce the order of the coverage error of nonparametric prediction intervals based on right-censored data

    Article • Journal of Multivariate Analysis, August 2014, Elsevier

    Professor Erhard Cramer

  54. Further Results on Order Statistics Generated by Two Simulation Methods

    Article • Communications in Statistics - Simulation and Computation, June 2014, Taylor & Francis

    Professor Erhard Cramer

  55. On the method of pivoting the CDF for exact confidence intervals with illustration for exponential mean under life-test with time constraints

    Article • Statistics & Probability Letters, June 2014, Elsevier

    Professor Erhard Cramer

  56. Extreme Value Analysis for Progressively Type-II Censored Order Statistics

    Article • Communication in Statistics- Theory and Methods, April 2014, Taylor & Francis

    Professor Erhard Cramer

  57. SOME CONVEXITY PROPERTIES OF THE DISTRIBUTION OF LOWER k-RECORD VALUES WITH EXTENSIONS

    Article • Probability in the Engineering and Informational Sciences, March 2014, Cambridge University Press

    Professor Erhard Cramer

  58. Exact meta-analysis of several independent progressively type-II censored data

    Article • Applied Mathematical Modelling, February 2014, Elsevier

    Professor Erhard Cramer

  59. Grundlagen der Wahrscheinlichkeitsrechnung und Statistik

    Article • January 2014

    Professor Erhard Cramer

  60. Optimal Experimental Designs

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  61. Information Measures

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  62. Accelerated Life Testing

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  63. Multi-sample Models

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  64. Acceptance Sampling Plans

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  65. The Art of Progressive Censoring

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  66. Progressive Type-II Censoring: Distribution Theory

    Article • January 2014, Springer Science + Business Media

    Professor Erhard Cramer

  67. On some exact distributional results based on Type-I progressively hybrid censored data from exponential distributions

    Article • Statistical Methodology, January 2013, Elsevier

    Professor Erhard Cramer

  68. On properties of progressively Type-II censored order statistics arising from dependent and non-identical random variables

    Article • Statistical Methodology, January 2013, Elsevier

    Professor Erhard Cramer

  69. Fisher information in generalized order statistics

    Article • Statistics, December 2012, Taylor & Francis

    Professor Erhard Cramer

  70. Laplace record data

    Article • Journal of Statistical Planning and Inference, July 2012, Elsevier

    Professor Erhard Cramer

  71. Computational aspects of statistical intervals based on two Type-II censored samples

    Article • Computational Statistics, June 2012, Springer Science + Business Media

    Professor Erhard Cramer

  72. A- and D-optimal progressive Type-II censoring designs based on Fisher information

    Article • Journal of Statistical Computation and Simulation, June 2012, Taylor & Francis

    Professor Erhard Cramer

  73. Exact nonparametric meta-analysis for multiple independent doubly Type-II censored samples

    Article • Computational Statistics & Data Analysis, May 2012, Elsevier

    Professor Erhard Cramer

  74. Progressive Censoring Methodology

    Article • February 2012, Springer Science + Business Media

    Professor Erhard Cramer

  75. Wirtschaftsmathematik

    Article • January 2012, De Gruyter

    Professor Erhard Cramer

  76. Vorkurs Mathematik

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  77. Beschreibende Statistik

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  78. Verhältnis- und Indexzahlen

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  79. Empirische Verteilungsfunktion

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  80. Regressionsanalyse

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  81. Konzentrationsmessung

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  82. Klassierte Daten

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  83. Einführung und Grundbegriffe

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  84. Lage- und Streuungsmaße

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  85. Zeitreihenanalyse

    Article • January 2012, Springer Science + Business Media

    Professor Erhard Cramer

  86. Characterizations of geometric distribution through progressively Type-II right-censored order statistics

    Article • Statistics, December 2011, Taylor & Francis

    Professor Erhard Cramer

  87. Influence of Selection Bias on the Test Decision

    Article • Methods of Information in Medicine, November 2011, Schattauer GmbH

    Professor Erhard Cramer

  88. The impact of selection bias on test decisions in randomized clinical trials

    Article • Statistics in Medicine, June 2011, Wiley

    Professor Erhard Cramer

  89. Asymptotically optimal progressive censoring plans based on Fisher information

    Article • Journal of Statistical Planning and Inference, May 2011, Elsevier

    Professor Erhard Cramer

  90. Minimum and Maximum Information Censoring Plans in Progressive Censoring

    Article • Communication in Statistics- Theory and Methods, April 2011, Taylor & Francis

    Professor Erhard Cramer

  91. Bayesian estimation and prediction with multiply Type-II censored samples of sequential order statistics from one- and two-parameter exponential distributions

    Article • Journal of Statistical Planning and Inference, April 2011, Elsevier

    Professor Erhard Cramer

  92. Progressively Type-II censored competing risks data from Lomax distributions

    Article • Computational Statistics & Data Analysis, March 2011, Elsevier

    Professor Erhard Cramer

  93. NONPARAMETRIC META-ANALYSIS FOR MINIMAL-REPAIR SYSTEMS

    Article • Australian & New Zealand Journal of Statistics, December 2010, Wiley

    Professor Erhard Cramer

  94. Association of progressively Type-II censored order statistics

    Article • Journal of Statistical Planning and Inference, February 2010, Elsevier

    Professor Erhard Cramer

  95. Wirtschaftsmathematik

    Article • December 2009, De Gruyter

    Professor Erhard Cramer

  96. Generalized order statistics from arbitrary distributions and the Markov chain property

    Article • Journal of Statistical Planning and Inference, December 2009, Elsevier

    Professor Erhard Cramer

  97. Adaptive progressive Type-II censoring

    Article • Test, October 2009, Springer Science + Business Media

    Professor Erhard Cramer

  98. Some results on order statistics generated by two simulation methods

    Article • Statistics & Probability Letters, September 2009, Elsevier

    Professor Erhard Cramer

  99. Hermite interpolation polynomials and distributions of ordered data

    Article • Statistical Methodology, July 2009, Elsevier

    Professor Erhard Cramer

  100. Permanent Expansions and Distributions of Order Statistics in the INID Case

    Article • Communication in Statistics- Theory and Methods, June 2009, Taylor & Francis

    Professor Erhard Cramer

  101. Vorkurs Mathematik

    Article • January 2009, Springer Science + Business Media

    Professor Erhard Cramer

  102. Optimierung

    Article • January 2009, Springer Science + Business Media

    Professor Erhard Cramer

  103. Fisher information based progressive censoring plans

    Article • Computational Statistics & Data Analysis, December 2008, Elsevier

    Professor Erhard Cramer

  104. Exact two-sample nonparametric confidence, prediction, and tolerance intervals based on ordinary and progressively type-II right censored data

    Article • Test, November 2008, Springer Science + Business Media

    Professor Erhard Cramer

  105. Mixture representation for order statistics from INID progressive censoring and its applications

    Article • Journal of Multivariate Analysis, October 2008, Elsevier

    Professor Erhard Cramer

  106. Comments on: Progressive censoring methodology: an appraisal

    Article • Test, June 2007, Springer Science + Business Media

    Professor Erhard Cramer

  107. Optimality Criteria and Optimal Schemes in Progressive Censoring

    Article • Communication in Statistics- Theory and Methods, May 2007, Taylor & Francis

    Professor Erhard Cramer

  108. Dependence structure of generalized order statistics

    Article • Statistics, October 2006, Taylor & Francis

    Professor Erhard Cramer

  109. Sequential Order Statistics

    Article • August 2006, Wiley

    Professor Erhard Cramer

  110. Progressive censoring from heterogeneous distributions with applications to robustness

    Article • Annals of the Institute of Statistical Mathematics, July 2006, Springer Science + Business Media

    Professor Erhard Cramer

  111. On optimal schemes in progressive censoring

    Article • Statistics & Probability Letters, May 2006, Elsevier

    Professor Erhard Cramer

  112. Relation for joint densities of progressively censored order statistics

    Article • Statistics, December 2005, Taylor & Francis

    Professor Erhard Cramer

  113. Characterization of the Exponential Distribution by Conditional Expectations of Generalized Spacings

    Article • May 2005, Taylor & Francis

    Professor Erhard Cramer

  114. An asymptotic approach to progressive censoring

    Article • Journal of Statistical Planning and Inference, March 2005, Elsevier

    Professor Erhard Cramer

  115. Prüfungsvorbereitung Wirtschaftsmathematik

    Article • January 2005, De Gruyter

    Professor Erhard Cramer

  116. Sequential Order Statistics

    Article • October 2004, Wiley

    Professor Erhard Cramer

  117. Logconcavity and unimodality of progressively censored order statistics

    Article • Statistics & Probability Letters, June 2004, Elsevier

    Professor Erhard Cramer

  118. Unimodality of uniform generalized order statistics, with applications to mean bounds

    Article • Annals of the Institute of Statistical Mathematics, March 2004, Springer Science + Business Media

    Professor Erhard Cramer

  119. Characterizations via Linear Regression of Ordered Random Variables: A Unifying Approach

    Article • Communication in Statistics- Theory and Methods, January 2004, Taylor & Francis

    Professor Erhard Cramer

  120. Marginal distributions of sequential and generalized order statistics

    Article • Metrika, December 2003, Springer Science + Business Media

    Professor Erhard Cramer

  121. Characterizations of exponential distributions by spacings of generalized order statistics

    Article • Applicationes Mathematicae, January 2003, Institute of Mathematics, Polish Academy of Sciences

    Professor M. Z. Raqab, Professor Erhard Cramer

  122. On the existence of moments of generalized order statistics

    Article • Statistics & Probability Letters, October 2002, Elsevier

    Professor Erhard Cramer

  123. A NOTE ON MOMENTS OF PROGRESSIVELY TYPE II CENSORED ORDER STATISTICS

    Article • Communication in Statistics- Theory and Methods, July 2002, Taylor & Francis

    Professor Erhard Cramer

  124. Evaluations of expected generalized order statistics in various scale units

    Article • Applicationes Mathematicae, January 2002, Institute of Mathematics, Polish Academy of Sciences

    Professor Erhard Cramer

  125. e-stat: A Web-based Learning Environment in Applied Statistics

    Article • January 2002, Springer Science + Business Media

    Professor Erhard Cramer

  126. ON THE JOINT COMPLETENESS OF INDEPENDENT STATISTICS

    Article • Statistics & Risk Modeling, January 2002, De Gruyter

    Professor Erhard Cramer

  127. Bounds for means and variances of progressive type II censored order statistics

    Article • Statistics & Probability Letters, October 2001, Elsevier

    Professor Erhard Cramer

  128. INFERENCE FOR STRESS-STRENGTH MODELS BASED ON WEINMAN MULTIVARIATE EXPONENTIAL SAMPLES

    Article • Communication in Statistics- Theory and Methods, March 2001, Taylor & Francis

    Professor Erhard Cramer

  129. On distributions Of generalized order statistics

    Article • Statistics, January 2001, Taylor & Francis

    Professor Erhard Cramer

  130. Article • Annals of the Institute of Statistical Mathematics, January 2001, Springer Science + Business Media

    Professor Erhard Cramer

  131. Ch. 12. Sequential k-out-of-n systems

    Article • January 2001, Elsevier

    Professor Erhard Cramer

  132. Wirtschafts-mathematik

    Article • January 2001, De Gruyter

    Professor Erhard Cramer

  133. Relations for expectations of functions of generalized order statistics

    Article • Journal of Statistical Planning and Inference, August 2000, Elsevier

    Professor Erhard Cramer

  134. Asymptotic estimators of the sample size in a record model

    Article • Statistical Papers, April 2000, Springer Science + Business Media

    Professor Erhard Cramer

  135. Estimation of the mean and the covariance matrix under a marginal independence assumption — an application of matrix differential calculus

    Article • Linear Algebra and its Applications, February 1999, Elsevier

    Professor Erhard Cramer

  136. Article • Extremes, January 1999, Springer Science + Business Media

    Professor Erhard Cramer

  137. Conditional Iterative Proportional Fitting for Gaussian Distributions

    Article • Journal of Multivariate Analysis, May 1998, Elsevier

    Professor Erhard Cramer

  138. Maximum Likelihood Estimation With Different Sequential k-out-of-n Systems

    Article • January 1998, Springer Science + Business Media

    Professor Erhard Cramer

  139. The UMVUE ofP(X

    Article • Metrika, January 1997, Springer Science + Business Media

    Professor Erhard Cramer

  140. Sequential order statistics and k-out-of-n systems with sequentially adjusted failure rates

    Article • Annals of the Institute of Statistical Mathematics, September 1996, Springer Science + Business Media

    Professor Erhard Cramer