Department of Statistical Science




Research
Interests

Teaching
STAT 2331 Introduction to Statistical Methods STAT 5304 Introduction to Statistical Computing STAT 6304 Computational Statistics STAT 6350 Analysis of Lifetime Data STAT 6385 Survey of Nonparametric Statistics STAT 6360 Statistical Methods in Epidemiology 
Professional Memberships
American Statistical Association (ASA): Member
Institute of Electrical and Electronics Engineers (IEEE):
Elected Senior Member
International Chinese Statistical Association (ICSA):
Life Member
International Indian Statistical Association (IISA):
Life Member
International Statistical Institute (ISI): Elected Member
Highlights of Professional Services
2008 – Present: Associate Editor, Communications in Statistics – Theory and Methods
2008 – Present: Associate Editor, Communications in Statistics – Simulations and Computation
2013 – Present: Editorial Board Member, SAGE Open
2013 – Present: Associate Editor, Journal of Statistical Computation and Simulation
2014 – Present: Associate Editor, Statistics and Probability Letters
2015 – Present: Associate Editor, Computational Statistics
Books authored/edited
PrecedenceType Tests and Applications (coauthored with N. Balakrishnan), John Wiley & Sons, Hoboken, New Jersey, 2006 (324 pages).  
Ordered Data Analysis, Modeling and Health Research Methods  In Honor of H. N. Nagaraja's 60th Birthday (coedited with P. K. Choudhary and C. H. Nagaraja), Springer Proceedings in Mathematics & Statistics, Vol. 149, Springer, New York, 2015. 
Selected Publications
To appear
Chan, P. S., Balakrishnan, N., So, H. Y., Ng, H. K. T.. Optimal Sample Size Allocation for MultiLevel Stress Testing with Exponential Regression Under TypeI Censoring, to appear in Communications in Statistics – Theory and Methods.
Chen, Z., Ng, H. K. T., J. Li, Liu, Q. and Huang, H.. Detecting associated singlenucleotide polymorphisms on the X chromosome in case control genomewide association studies, to appear in Statistical Methods in Medical Research.
Ng, H. K. T., Kinaci, İ., Kuș, C. and Chan, P. S.. Optimal Experimental Plan for Multilevel Stress Testing with Weibull Regression under Progressive TypeII Extremal Censoring, to appear in Communications in Statistics – Computation and Simulation.
Ng,
H. K. T., Duan, F. and Chan, P. S.. On
Conditional Moments of Progressively Censored Order Statistics with a Time
Constraint, to appear in Springer
Proceedings in Mathematics and Statistics: Ordered
Data Analysis, Models and Health Research Methods.
Singpurwalla, N. D., Arnold, B. C., Gastwirth, J. L., Gordon,
A. S. and Ng, H. K. T.. Adversarial and Amiable Inference in Medical Diagnosis,
Reliability, and Survival Analysis, to appear in International
Statistical Review.
Yang, Y., Ng, H. K. T. and Balakrishnan, N. A stochastic expectationmaximization algorithm for the analysis of system lifetime data with known signature, to appear in Computational Statistics.
2015
Chan, P. S., Ng, H. K. T. and Su, F. (2015). Exact
Likelihood Inference for the TwoParameter Exponential Distribution under
TypeII Progressively Hybrid Censoring, Metrika,
78, 747 – 770.
Park, S., Ng, H. K. T. and Chan,
P. S. (2015). On Fisher Information and Design of a Flexible Progressive Censored
Experiment, Statistics &
Probability Letters, 97, 142 – 149.
Thas, O., Yuan, A., Ng, H. K. T., and Zheng, G. (2015). A proportional score test over the nuisance parameter space: Properties and applications, Statistics & Probability Letters, 106, 295–300.
Zhang, J., Ng, H. K. T. and Balakrishnan, N. (2015). Statistical Inference
of Component Lifetimes with LocationScale Distributions from Censored System
Failure Data with Known Signature, IEEE
Transactions on Reliability,
64, 613 – 626.
2014
Chen, Z., Huang, H. and Ng, H. K. T. (2014). An Improved Robust Association Test for GWAS with Multiple Diseases, Statistics & Probability Letters, 93, 153 – 161.Chen, Z., Ng, H. K. T. and Nadarajah, S. (2014). A Note on Cochran Test for Homogeneity in Oneway ANOVA and Metaanalysis, Statistical Papers, 55, 301 – 310.
Gao, W., Chan, P. S., Ng, H. K. T. and Lu, X (2014). Efficient computational algorithm for optimal allocation in regression models, Journal of Computational and Applied Mathematics, 261, 118 – 126.
Han, D. and
Kinaci, İ., Akdoǧan, Y., Kuș, C. and Ng, H. K. T.
(2014).
Statistical Inference for Weibull Distribution Based on a Modified Progressive
TypeII Censoring Scheme, Sri
Lankan Journal of Applied Statistics (Invited Paper), Special
Issue, 95 – 116.
Ye,
Ye, Z. S. and Ng, H. K. T. (2014). On Analysis of Incomplete Field Failure Data, Annals of Applied Statistics, 8, 1713 – 1727.
2013
Chen, Z., Huang, H., Liu, J. Ng, H. K. T., Nadarajah, S., Huang, X. and Deng, Y. (2013). Detecting differentially methylated loci for Illumina Array methylation data based on human ovarian cancer data, BMC Medical Genomics, 6 (Suppl 1): S9.
Han, D. and
Lin, Y. J., Lio, Y. L. and Ng, H. K. T. (2013). Bayesian Estimation of MoranDownton Bivariate Exponential Distribution based on Censored Samples, Journal of Statistical Computation and Simulation, 83, 837852.
Ng, H. K. T., Tripathi, R. C. and Balakrishnan, N. (2013). A TwoStage Wilcoxontype Nonparametric Test for Stochastic Ordering in Two Samples, Journal of Nonparametric Statistics, 25, 7389.
Zhou, P., Chan, P. S., Li, L. and Ng, H. K. T. (2013). Allocation of Two Redundancies in TwoComponents Series Systems, Naval Research Logistics, 60, 588598.
Zhou, P., Chan, P. S., Li, L. and Ng, H. K. T (2013). On allocation of redundancies in twocomponent series systems, Operations Research Letters, 41, 690693.
2012
Chen, Z. and Ng, H. K. T. (2012). A Robust Method for Testing Association in Genomewide Association Studies, Human Heredity, 73, 2634.
Chen,
Gupta, V., Khadgawat,
R. Ng, H. K. T., K
Navarro,
J., Ng, H. K. T. and Balakrishnan, N.
(2012).
Parametric Inference for Component
Distributions from Lifetimes of Systems with Dependent Components, Naval Research Logistics
Ng, H. K. T., Luo, L., Hu, Y. and Duan, F.
(2012).
Parameter estimation of threeparameter Weibull distribution based on
progressively TypeII censored samples,
Journal of Statistical Computation and
Simulation
Ng, H. K. T., Navarro, J. and Balakrishnan, N. (2012). Parametric Inference for System Lifetime Data with Signatures Available under a Proportional Hazard Rate Model, Metrika, 75, 367388.
Park, S. and Ng, H. K. T. (2012). On Fisher Information in TypeII Progressively Censored Data with Applications in Optimal Onestep Censoring Plan, Statistics & Probability Letters, 82, 396 – 402.
Zhao, P., Chan, P. S. and
2011
Arnold, B. C. and Ng, H. K. T. (2011). Bivariate
Beta Distribution,
Journal of Multivariate Analysis
Balakrishnan, N., Ng, H. K. T. and
Navarro, J. (2011). Linear Inference for TypeII
Censored System Lifetime Data with Signatures Available, IEEE
Transactions on Reliability
Balakrishnan, N., Ng, H. K. T. and Navarro, J. (2011). Exact Nonparametric Inference for Component Lifetime Distribution based on Lifetime Data from Systems with Known Signatures, Journal of Nonparametric Statistics, 23, 741752.
Chen, Z., Liu, Q., Ng, H. K. T., Nadarajah, S. and Deng, Y. (2011). Statistical methods on detecting differentially expressed genes for RNAseq data, BMC Systems Biology, 5 (Suppl 3):S1.
Ka, C. Y., Chan, P. S., Ng, H. K. T. and Balakrishnan, N. (2011). Optimal Sample Size Allocation for Multilevel Stress Testing with Extreme Value Regression under TypeII Censoring, Statistics, 45, 257 – 279.
SenGupta, A. and Ng, H. K. T. (2011). Nonparametric
Test for Homogeneity of Overall Variability,
Journal of Applied Statistics
Balakrishnan, N., Tripathi, R.
C., Kannan, N. and Ng, H. K. T. (2010).
Some nonparametric precedencetype tests based
on progressively censored samples and evaluation of power, Journal of Statistical Planning and Inference,
Filardo, G., Adams, J. and Ng, H. K. T. (2010). Statistical Methods in Epidemiology, In International Encyclopedia of Statistical Science (Eds., M. Lovric), Springer.
Tang, M. L. and Ng, H. K. T. (2010). Inverse Sampling, In International Encyclopedia of Statistical Science (Eds., M. Lovric), Springer.
Balakrishnan, N. and Ng, H. K. T. (2009). PrecedenceType Tests for the Comparison of Treatments with a Control, in Scan Statistics: Methods and Applications (J. Glaz, V. Pozdnyakov and S. Wallenstein, eds), pp. 2754, Birkhäuser, Boston.
Chan, P. S. and Ng, H. K. T. (2009).
Lin, C. T., Ng, H. K. T. and Chan, P. S.
(2009).
Statistical Inference of TypeII Progressively Hybrid Censored Data with Weibull
Lifetimes, Communications in Statistics – Theory and Methods
Ng, H. K. T., Kundu, D. and Chan,
P. S. (2009). Statistical Analysis of Exponential Lifetimes Under an Adaptive TypeII
Progressive Censoring Scheme,
Ng, H. K. T. and Wang, Z. (2009). Statistical
Estimation for the Parameters of Weibull Distribution based on progressively
TypeI interval censored sample, Journal of Statistical
Computation and Simulation
Tian, M., Tang, M. L., Ng, H. K. T.
and Chan, P. S. (2009). A
comparative study of confidence intervals for negative binomial proportion,
Journal of Statistical Computation and Simulation
Wang, Z. and Ng, H. K. T. (2009). Design and Analysis of Analgesic Trials with Paired TimetoEvent Endpoints, in Design, Summarization, Analysis & Interpretation of Clinical Trials with TimetoEvent Endpoints (K. E. Peace, eds.), pp. 269291, Taylor & Francis.
2008
Balakrishnan, N. and Ng, H. K. T. (2008). Precedence Tests, In Encyclopedia of Statistics in Quality and Reliability (Eds., F. Ruggeri, R. Kenett and F. Faltin), Chichester, UK: John Wiley & Sons.
Chan, P. S., Ng, H. K. T., Balakrishnan, N. and Zhou, Q. (2008).
Point and interval estimation for extremevalue
regression model under TypeII censoring
Gu, K., Ng, H. K. T., Tang, M. L. and
Schucany, W. R. (2008). Testing the Ratio of Two Poisson Rates,
Biometrical Journal
Liao, Y. J., Tang, M. L. Ng, H. K. T. (2008). On tests of risk ratio under standard inverse sampling, Computer Methods and Programs in Biomedicine, 89, 261268.
Ng, H. K. T., Filardo, G. and Zheng, G. (2008). Confidence Interval Estimating
Procedures for Standardized Incidence Rates, Computational
Statistics and Data Analysis,
Tian, M., Tang, M. L., Ng, H. K. T. and Chan, P. S. (2008). Confidence Interval Estimators for Risk Ratio under Inverse Sampling, Statistics in Medicine, 27, 33013324.
Zheng, G. and Ng, H. K. T. (2008). Genetic model selection in twophase analysis for casecontrol association studies, Biostatistics, 9, 391399
2007
Balakrishnan, N., Kundu, D., Ng, H. K. T. and Kannan, N. (2007). Point and Interval Estimation for a Simple StepStress Model with TypeII Censoring, Journal of Quality Technology, 39, 3547.
Filardo, G., Hamilton, C., Hamman, B., Ng, H. K. T. and Grayburn. P. (2007). Categorizing BMI may lead to biased results in studies investigating inhospital mortality after isolated CABG, Journal of Clinical Epidemiology, 60, 1132 – 1139.
Ng, H. K. T., Balakrishnan. N. and Chan, P. S. (2007). Optimal Sample Size Allocation in Extreme Value Regression, Naval Research Logistics, 54, 237249.
Ng, H. K. T., Balakrishnan. N. and Panchapakesan, S. (2007). Selecting the Best Population Using a Test for Equality Based on Minimal Wilcoxon Ranksum Precedence Statistic, Methodology and Computing in Applied Probability, 9, 263305.
Ng, H. K. T., Gu, K. and Tang, M. L. (2007). A Comparative Study of Tests for the Difference of Two Poisson Means, Computational Statistics and Data Analysis, 51, 30853099.
Ng, H. K. T. and Panchapakesan, S. (2007). Is the Selected Multinomial Cell the Best? Sequential Analysis, 26, 415 – 423.
Tang, M. L., Liao, Y. J., Ng, H. K. T. and
Chan, P. S. (2007).
Testing the
NonUnity of Rate Ratio under Inverse Sampling,
Biometrical Journal
2006
Balakrishnan, N., Ng, H. K. T. and Panchapakesan, S. (2006). A
Nonparametric Procedure Based on Early Failures for Selecting the Best
Population Using a Test for Equality, Journal of Statistical
Planning and Inference,
Choudhary, P. K. and Ng, H. K. T. (2006). Assessment of Agreement
Under Nonstandard Conditions Using Regression Models for Mean and Variance, Biometrics
Khoshnood, K., Wilson, K. S., Filardo, G., Liu, Z., Ng, H. K. T. and Wu, Z. (2006). Assessing the efficacy of a voluntary HIV counseling and testing intervention for pregnant women and male partners in Urumqi city, China, AIDS and Behavior, 10, 671681.
Ng, H. K. T. and Balakrishnan, N. (2006). Precedence Testing, In Encyclopedia of Statistical Sciences 9, second edition (Eds., S. Kotz, N. Balakrishnan, C. B. Read, and B. Vidakovic), pp. 63176323, Hoboken, NJ: John Wiley & Sons.
Schucany,
Wang, Z. and Ng, H. K. T. (2006). A Comparative Study of Tests for Paired Lifetime Data, Lifetime Data Analysis, 12, 505522.
2005
Ng, H. K. T. (2005). Parameter Estimation for a Modified Weibull Distribution for Progressively TypeII Censored Samples, IEEE Transactions on Reliability, 54, 374380.
Ng, H. K.
T. and Balakrishnan, N. (2005). Weighted Precedence and Maximal Precedence Tests and an Extension to
Progressive Censoring, Journal of Statistical Planning and
Inference, 135, 197221.
Ng, H. K. T. and Tang, M. L. (2005). Testing the equality of two Poisson means using the rate ratio, Statistics in Medicine, 24, 955  965.
2004
Balakrishnan, N., Ng, H. K. T. and Kannan, N. (2004). GoodnessofFit Tests Based on Spacings for Progressively TypeII Censored Data from a General LocationScale Distribution, IEEE Transactions on Reliability, 53, 349356.
Ng, H. K.
T. and Balakrishnan, N. (2004). Wilcoxontype Ranksum Precedence Tests, Australia and
New Zealand Journal of Statistics, 46, 631  648.
Ng, H. K. T., Chan, P. S. and Balakrishnan, N. (2004). Optimal Progressive Censoring Plan for The Weibull Distribution, Technometrics, 46, 470  481.
Tang, M. L. and Ng, H. K. T. (2004). Letter to the Editor, comments on “Confidence limits for the ratio of two rates based on likelihood scores: noniterative method” by Graham, P. L., Mengersen, K. and Morton, A. P., Statistics in Medicine, 2003; 22: 20712083, Statistics in Medicine, 23, 685693.
2003
Balakrishnan, N., Kannan, N., Lin, C. T. and Ng, H. K. T. (2003). Point and interval Estimation for Gaussian Distribution, Based on Progressively TypeII Censored Samples, IEEE Transactions on Reliability, 52, 9095.
Ng, H. K. T., Kundu, D. and Balakrishnan, N. (2003). Modified moment estimation for twoparameter BirnbaumSaunders distribution, Computational Statistics and Data Analysis, 43, 283298.
2002
Balakrishnan, N., Ng, H. K. T. and Kannan, N. (2002). A Test
of Exponentiality Based on Spacings for Progressively TypeII Censored Data, in GoodnessofFit
Tests and Model Validity (C. HuberCarol et al., eds.), pp. 89110. Birkhäuser,
Boston.
Ng, H. K. T. and Balakrishnan, N. (2002). Wilcoxontype Ranksum Precedence Tests: Largesample approximation and evaluation, Applied Stochastic Models in Business and Industry, 18, 271286.
Ng, H. K. T., Chan, P. S. and Balakrishnan, N. (2002).
Estimation of Parameters From Progressively Censored Data Using EM Algorithm, Computational
Statistics and Data Analysis, 39, 371386.
2001
Balakrishnan, N. and Ng, H. K. T. (2001). Improved Estimation of the Correlation Coefficient in a Bivariate Exponential Distribution, Journal of Statistical Computation and Simulation, 68, 173184.
Balakrishnan, N. and Ng, H. K. T. (2001). On Estimation of the Correlation Coefficient in MoranDownton Multivariate Exponential Distribution, Journal of Statistical Computation and Simulation, 71, 4158.
Balakrishnan, N. and Ng. H. K. T. (2001). A General Maximal Precedence Test, in System and Bayesian Reliability (Y. Hayakawa, T. Irony and M. Xie, eds.), pp. 105122. Singapore: World Scientific Publishing Co. Pte. Ltd.
Lam, Y. and Ng, H. K. T. (2001). A General Model for Consecutivekoutn: F repairable system with exponential distribution and (k1)step Markov dependence, European Journal of Operational Research, 129, 663682.
Last update: September 2, 2015