Department of Statistics

Dr. Sadia Khalil

Dr. Sadia Khalil
Dr. Sadia Khalil

Assistant Professor
Department of Statistics
E-mail: Sadia.This email address is being protected from spambots. You need JavaScript enabled to view it., This email address is being protected from spambots. You need JavaScript enabled to view it.

                       

Work Experience

  • Feb 2018 – Present             Assistant Professor, Department of Statistics, Lahore College for Women University Lahore, Pakistan
  • June 2012 – Jan 2018        Lecturer, Department of Statistics, Lahore College for Women University. Lahore, Pakistan
  • Oct 2011 – June 2012        Statistician, Idara Taleem-o-Agahi (Centre for Education and Consciousness), Lahore, Pakistan
  • Dec 2005 – May 2010         Statistician, Contech International Health Consultants, Lahore 

Academic Preparation 

  • June 2019 – Aug 2019        Visiting Research Scholar/Postdoc (with Professor Sat Gupta),  University of North Carolina Greensboro, USA 
  • Aug 2014 – Feb.2018         PhD (Statistics), National College for Business Administration & Economics, Lahore, Pakistan
  • PhD Dissertation Title: Generalized Mean Estimators for Sensitive and Non-Sensitive Variables in the Presence of Measurement Errors 
  • Oct 2004 – Sept 2006            M Phil. Statistics, Govt. College University, Lahore, Pakistan     
  • Sept 2002 – Aug 2004            M Sc. Statistics, Govt. College University, Lahore, Pakistan
  • Aug 2000 – Aug 2002         B Sc. General Science, Queen Mary College, Lahore, Pakistan

International/National Experience, Honors and Awards

  • Co- Investigator on a funded 3-year NSF grant (DMS-2244160, $405,000) for a REU program on “Complex Data Analysis Using Statistical and Machine Learning Tools” at UNC Greensboro during summers of 2023-25.
  • Associate Editor for the Journal of Statistical Theory and Practice since 2020.
  • Courtesy Appointment as a Graduate Faculty at the University of North Carolina, Greensboro, USA, Spring 2021 onwards, for the sole purpose of being able to serve on PhD dissertation committees.
  • Organized and chaired a Session on “Randomized Response Models” at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics (AISC-2024) held at UNC Greensboro, October 11-13, 2024.
  • Served as a Moderator of a session at SUMS Conference at James Madison University, Virginia, October 07, 2023
  • Received a Research Productivity Award from my home institution LCWU in June 2023.
  • Organized and chaired a session on Randomized Response Models at the UNCG Regional Mathematics and Statistics Conference on November 12, 2022.
  • Organized and chaired a Session on Randomized Response Models in Survey Sampling at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics (AISC-2022) held at UNC Greensboro, October 7-9, 2022.
  • Attended Joint Statistical Meetings (JSM) in 2019 (Denver) and in 2022 (Washington DC).
  • Two short research visits to UNC Greensboro, USA - in July-Aug 2021, and March-April 2022.
  • Served as a Moderator of a Session on Survey Sampling at 2nd International Conference on Statistical Sciences-2022 “Applied Statistics & Sustainable Development Goals” held at GCU, Lahore, March 09-10, 2022.
  • Chaired a Session on Survey Sampling at the UNCG Regional Mathematics & Statistics Conference held at UNC Greensboro, USA on November 20, 2021.
  • Chaired a Session on RRT Models in Survey Sampling at the International Conference on “Advances in Interdisciplinary Statistics and Combinatorics (AISC-2021)” held at UNC Greensboro, USA from October 8-10, 2021.
  • Received Young Researcher Award from University of North Carolina, Greensboro in September 2018 to present a paper at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics-AISC, Oct 05-07, 2018.
  • Received Research Incentive Award from LCWU for the year-2017

Computer Skills

MS Office | SPSS | Minitab | R | Latex | Python

Mentoring of Graduate Students / Undergraduate Students / Honors Students 

PhD Students (All at UNC Greensboro-USA) 

I served on the Ph.D. Dissertation Committees of four students at UNC Greensboro, USA.
  • Michael Parker - graduated in Summer 2025. I co-authored four journal articles with him.
  • Wenhao Shou - graduated in Summer 2024. I co-authored two journal articles with her.
  • Pujita Sapra - graduated in Summer 2023. I co-authored five journal articles with her
  • Badr Aloraini - graduated in June 2021. I co-authored four journal articles with him. One of these papers received the 2nd best paper award at the National Competition of Young Statisticians Research in Saudi Arabia in 2021.
MS Students (All at LCWU, Pakistan)
  • Nimra Kareem (2020-22): Thesis on “Improved efficiency through mixture quantitative randomized response models” LCWU, Lahore. She was awarded with 2nd best presentation award in a Poster Competition.
  • Omaima Afzal (2020-22): Thesis on “Efficiency and privacy protection using randomized response models in mean estimation under two-phase sampling for partial and no-information cases” LCWU, Lahore. Her research article is under review.
  • Fakhar-ul-Nisa (2019-2021): Thesis on “Impact of measurement errors & non-response on mean estimation of sensitive variable using non sensitive auxiliary variables in two-phase sampling”. LCWU, Lahore. Her research article is accepted and in press for the Journal of Interdisciplinary Mathematics.
  • Aimen Aslam (2019-2021): Thesis on “Generalized estimators of population mean under the joint influence of measurement error and non-response using auxiliary variables in simple and stratified two-phase sampling” LCWU, Lahore. (She took Extension)
  • Usra Shuja (2018-2020): Thesis on “Estimation of population mean of sensitive study variable based on randomized response technique using auxiliary information in the presence of measurement errors under two-phase sampling” LCWU, Lahore. Her research article is published in Journal of Interdisciplinary Mathematics.
  • Zoia Abid (2017-2019): Thesis on “Generalized mean estimators using single and two auxiliary variables in the presence of measurement errors under two-phase sampling” LCWU, Lahore.
Undergraduate Students
 
At UNC Greensboro
Served as mentor or co-mentor for several students under a NSF-funded Research Experience for Undergraduates (REU) program at UNC Greensboro 
  • Lead Mentor for three students in Summer 2024 (Caroline Wyrick, Yessica Arzate & Kendal Walker, all from UNC Greensboro).
  • Lead Mentor for two students in Summer 2023 (Jamie Lin of UNC Wilmington and Francisco Carrillo-Villagrana of UNC Asheville). Also served as Co-Mentor for two students in Summer 2023 (Bailey Meche of University of Louisiana Lafayette and Venu Poruri of UC Berkley).
  • Served as Co-Mentor for three students- Max Lovig of University of Louisiana Lafayette in 2020, Joia Zhang of University of Washington, Seattle in 2021, and William McCance of UC Santa Barbara in 2022 
At LCWU
  • Amber Qasim (2018-22): Internship Report: A comparative study on wheat production in Lahore, Faisalabad, D.G. khan and Rajanpur districts.
  • Aqsa Zia (2018-22): Internship Report: Study on customer’s satisfaction towards policies of state life insurance company.
  • Kinza (2018-22): Internship Report: Forecasting of Cigarettes production in Pakistan through time series models.
  • Hadia Ijaz (2018-22): “Internship Report: Study on factors affecting women while working in bank.
  • Kashaf (2021): Project on “Geometric Mean Ratio Estimator in Systematic Sampling” LCWU, Lahore.
  • Zunaira Azam (2020): “Internship Report on Pakistan Meteorological Department Lahore” LCWU, Lahore.
  • Kainat Batool (2018): Thesis on “Generalized Mean Estimator using Two Auxiliary Variables”. LCWU, Lahore.
  • Zoia Abid (2016): Thesis on “A Univariate Time Series Modeling of Citrus Fruits Production in Punjab”. LCWU, Lahore.
  • Supervised many other students on their internship reports at LCWU.
University Service 
At UNC Greensboro
  • Committee Member for organizing the State Math Contest for Middle and High School students
  • Member of the coordination committee for the Introductory Statistics courses STA 108 and STA 271 
At LCWU
  • In charge Departmental QEC
  • In charge Budget and Stock Register, Purchase of New Items
  • In charge LMS (Specific Tasks only)
  • MS Program coordinator (MS, PhD Admission and record keeping same and MS Exam conduct, record keeping and Award lists)
  • Website Upgradation (Reviewer of Departmental E-Newsletter and Website)
  • Member Doctoral Committee Statistics Department
  • Assistance in curriculum development
Courses Taught 
At UNC Greensboro
Graduate Sampling Course (STA 676)
Undergraduate Sampling course (STA 382)
Undergraduate Inference course (STA 352)
Undergraduate Introductory statistics courses STA 108 (online) and STA 271 (live)
Seminar in Computational Statistics (STA-701)
Topics in Computational Statistics (STA 709)
At LCWU
A variety of undergraduate, MS and Ph.D. (Statistics) level courses including; Advance Sampling Techniques, Design and Analysis of Surveys, Recent Advances in Sampling Estimators, Biostatistics, Categorical Data Analysis, Time Series Analysis, Probability and Probability Distributions, Statistical Inference. General Education Quantitative reasoning course.

Brief Statement of Research Interest

My main research interest lies in the area of survey sampling. I wrote my Ph.D. Dissertation on this topic. Specifically, I am interested in developing new RRT models in estimating prevalence of sensitive behaviors in society, both in the binary and quantitative domains, that account for lack of trust in the RRT methodology and also account for measurement errors and non-response. RRT models have been used extensively in real-life situations in many countries, and currently I am making an effort to estimate some such sensitive behaviors among students using our proposed RRT models so that proper interventions can be considered. This is an important issue because we usually concentrate more on theory and less on real applications of that theory.
I continue to collaborate with my PhD advisor Dr. Sat Gupta and his PhDs students at UNC Greensboro.  I also collaborate with undergraduate researchers at UNC Greensboro as part of the NSF funded REU program.

Publications

I have 28 published research papers; 03 under review, 02 other papers are in Press, in the area of Sampling and Applied Statistics. All are published in International Journals.
  1. Sapra, P., Zhang, Q., Khalil, S., and Gupta, S. (2025): Estimating Sensitive Variables using Auxiliary Information and Addressing Trust Deficits, Journal of Statistical Theory and Practice, (under review).
  2. Kalucha, G., Khalil, S., Gupta, M. and Gupta, S. (2025): Estimating the prevalence of Depression among college students -Field validation of a Complex Randomized Response Technique, Journal of Statistical Theory and Practice, (under review). 
  1. Parker, M., Gupta, S., and Khalil, S. (2025): Compromised privacy due to auxiliary information in Randomized Response Technique,” Communications in Statistics, (under review).
  2. Parker, M., Gupta, S., and Khalil, S. (2025): Impact of Auxiliary Information and Measurement Errors on Mean Estimation with Mixture Optional Enhanced Trust (MOET) Randomized Response Model, Axioms, 14(3), 183, https://doi.org/10.3390/axioms14030183
  1. Shou, W., Gupta, S. and Khalil, S. (2025) “Kernel Density Estimation of a Sensitive Variable in the Presence of Auxiliary Information” Communications in Statistics – Theory and Methods, 54(14), 4509-4516. https://doi.org/10.1080/03610926.2024.2422883.
  2. McCance, W., Gupta, S., Khalil, S., and Shou, W. (2025): Binary Randomized Response Technique (RRT) Models Under Measurement Error. Communications in Statistics - Simulation and Computation, Vol. 54, No. 6, 2193-2200 
  1. Parker, M., Gupta, S. and Khalil, S. (2024) “A Mixture Quantitative Randomized Response Model that improves trust in RRT Methodology” Axioms, 13(1), 11. https://doi.org/ 10.3390/axioms13010011. 
  1. Gupta, S., Parker, M., and Khalil, S. (2024): A Ratio Estimator for the Mean using a Mixture Optional Enhanced Trust (MOET) Randomized Response Model, Mathematics, 12(22), 3617 
  1. Meche, B., Poruri, V., Gupta, S. and Khalil, S. (2024). "Accounting for Measurement Error and Untruthfulness in Binary RRT Models” Mathematics 12(6), 875; https://doi.org/10.3390/math12060875 
  1. Aloraini, B., Khalil, S., Qureshi, N., and Gupta, S., (2024) “Estimation of Population Variance for a Sensitive variable in Stratified Sampling using Randomized Response Technique”, REVSTAT Statistical Journal. 22(3), 277-292 https://doi.org/10.57805/revstat.v22i3.508 
  1. Gupta, S., Aloraini, B., Qureshi, N., and Khalil, S. (2024). Estimation of Population Variance using Optional Randomized Response Technique Model in the Presence of Measurement Errors. Communications in Statistics – Simulation and Computation, Vol. 53, No. 12, 5994-6008
  1. Lovig, M., Khalil, S., Rahman, S., Sapra, P., Gupta, S. (2023): A Mixture Binary RRT Model with A Unified Measure of Privacy and Efficiency. Communications in Statistics – Simulation and Computation, Vol. 52, No. 6, 2727-2737
  2. Sapra, P., Mohanty, S., Khalil, S. and Gupta, S. (2023): A Hybrid Paillier Encryption and Randomized Response Technique Model for Surveying Sensitive Questions with Binary Response, Journal of Statistical Theory and Practice, Vol. 18, Article 4
  3. Fakhar, H., Khalil, S. (2022). “Improved Mean Estimation of Sensitive Study Variable Under Two Phase Sampling with Subsampling the Non-Respondents " Journal of Interdisciplinary Mathematics. (In Press) 
  1. Shuja, U., Khalil, S., Gupta, S. (2022). “Mean Estimation Using Scrambled Responses with the Impact of Measurement Errors in Two-Phase Sampling” Journal of Interdisciplinary Mathematics. 25(6), 1675-1695. 
  1. Gupta, S., Zhang, J., Khalil, S., & Sapra, P. (2022). Mitigating lack of trust in quantitative randomized response technique models. Communications in Statistics - Simulation and Computation, 53(6), 2624–2632. https://doi.org/10.1080/03610918.2022.2082477 
  1. Irum., Afzal, M., Khalil, S., Shamim., M., (2022) “Comparison of Shrinkage and Feature Selection Methods for Modeling GDP of Pakistan”, Journal of Statistics and Management Systems. 25(4), 957-969.
  1. Sapra, P., Khalil, S. & Gupta, S. (2022). “Accounting for Lack of Trust in Optional Binary RRT Models Using a Unified Measure of Privacy and Efficiency”. Journal of Statistical Theory and Practice 16(51) https://doi.org/10.1007/s42519-022-00279-3
  1. Zhang, Q., Khalil, S., Gupta, S. (2021). “Mean Estimation in the Simultaneous Presence of Measurement Errors and Non-response using Optional RRT Models under Stratified Sampling”. Journal of Statistical Computation and Simulation. 91(17), 3492-3504. 
  1. Khalil, S., Zhang, Q and Gupta, S. (2021) “Mean Estimation of Sensitive Variables under Measurement Errors using Optional RRT Models” Communications in Statistics part B: Simulation and Computation. 50 (5), 1417-1426. 
  1. Lovig, M., Khalil, S., Rahman, S., Sapra, P and Gupta, S. (2021)” A Mixture Binary RRT Model with a Unified Measure of Privacy and Efficiency” Communications in Statistics part B: Simulation and Computation. 52(6), 2727-2737.    
  1. Zhang, Q., Khalil, S., and Gupta, S. (2021) “Mean Estimation of Sensitive Variables under Non-response and Measurement Errors using Optional RRT Models”. Journal of Statistical Theory and Practice. 15(3). https://doi.org/10.1007/s42519-020-00135-2 
  1. Aloraini, B., Khalil, S., Qureshi, N., and Gupta, S. (2021) “Variance Estimation Using an Optional Randomized Response Technique”, Journal of Interdisciplinary Mathematics(In Press)
  1. Gupta, S., Aloraini, B., Qureshi, N., and Khalil, S. (2020) “Variance Estimation Using Randomized Response Technique”, REVSTAT Statistical Journal, 18(2), 165-176.
  1. Khalil, S., Noor-ul-Amin, M. and Hanif, M. (2019) “Generalized Estimator of Population Mean by using Conventional and Non-Conventional Measures in the Presence of Measurement Errors” Communications in Statistics part B: Simulation and Computation. 48(2), 516-529.
  1. Khalil, S., Gupta, S. and Hanif, M. (2019) “Estimation of finite Population Mean in Stratified Sampling using Scrambled Responses in the Presence of Measurement Errors” Communications in Statistics - Theory and Methods 48(6), 1553-1561.
  1. Zhang, Q., Gupta, S., Kalucha, G., and Khalil, S. (2019) “Ratio Estimation of the Mean under RRT Models” Journal of Statistics and Management Systems. 22(1), 97-113.
  2. Qureshi, N., Khalil, S., Chao, C.-T and Hanif, M. (2018) “Estimation of Rare and Clustered Population Variance in Adaptive Cluster Sampling” Communications in Statistics – Theory and Methods. 48(21), 5387-5400 
  1. Khalil, S., Gupta, S. and Hanif, M. (2018) “A Generalized Estimator for Finite Population Mean in the Presence of Measurement Errors in Stratified Random Sampling” Journal of Statistical Theory and Practice, 12(2), 311-324. 
  1. Gupta, S., Mehta, S., Shabbir, J. and Khalil, S. (2018) “A Unified Measure of Respondent Privacy and Model Efficiency in Quantitative RRT Models” Journal of Statistical Theory and Practice. 12(3), 506-511. 
  1. Khalil, S., Noor-ul-Amin, M. and Hanif, M. (2018) “Estimation of Population Mean for a Sensitive Variable in the Presence of Measurement Error” Journal of Statistics and Management Systems. 21(1), 81-91. 
  1. Qureshi, N., Khalil, S. and Hanif, M. (2018) “Generalized Semi Exponential Type Estimator under Systematic Sampling” Journal of Statistical Theory and Applications. 17(2), 283-290. 
  1. Qureshi, N., Khalil, S. and Hanif, M. (2018) “Joint Influence of Exponential Ratio and Exponential Product Estimator for the Estimation Clustered Population Mean in Adaptive Cluster Sampling” Advances and Applications in Statistics, 53(1), 13-28. 

Other Research or Professional Activities

  • I gave a research talk as an invited speaker in a Symposium on “Innovations in Statistical Sciences” held at LCWU, Lahore on Dec 12, 2022.
  • I conducted a workshop on “Categorical Data Analysis” on June 22, 2022 at LCWU, Lahore
  • Evaluation of the Ph.D. theses for the students of NCBA&E, as external examiner.
  • Refereed papers for these International Journals:
  • Communications in Statistics – Theory and Methods (USA)
  • Journal of Statistical Theory and Practice (USA)
  • Mathematical Population Studies: An International Journal of Mathematical Demography (UK)
  • Journal of the Indian Society of Agricultural Statistics (India)
  • Colombian Journal of Statistics (Revista Colombiana de Estadística)
  • As external examiner, reviewed MS level theses of GCU and NCBA&E students, Lahore
  • Conducted Intermediate Board duty as Statistical Practical Examiner in Lahore. 

Research Presentations

  • Paper presented on “Field Validation of a Mixture Binary RRT Models: Analyzing Prevalence, Trust, and Measurement Error in Sensitive Trait Estimation” at the symposium on Advances in Interdisciplinary Statistics and Combinatorics at University of North Carolina – Greensboro, USA (14-15, June 2025)
  • Paper presented on “The effect of measurement error on binary RRT Models” at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics at University of North Carolina – Greensboro, USA (11-13, October 2024).
  • Poster presented by Nimra kareem, Sadia Khalil. (2023). Awarded with 2nd best presentation award in a Poster Competition with theme Global Engagement Day: Embracing Diversity, Building Unity (Equity, Diversity and Inclusion) sponsored by University of Sunderland UK, held at Department of Statistics LCWU Lahore Pakistan (15, December, 2023).
  • Paper presented on “An Optional Quantitative Mixture RRT Model that Accounts for the Lack of Trust” at the 2nd International Conference on Recent Trends in Statistics and Data Analytics," at School of Natural Science (NUST) H-12 Islamabad Pakistan, (14-15 December 2023).
  • Paper presented on “Mean Estimation using RRT Models in Two Phase Sampling” at the 20th International Conference on “The Role of Data Science in Meeting the Challenges of Environmental Issues” at Imperial College of Business Studies, Lahore Pakistan, (09-11, March 2023).
  • Paper presented on “Mean Estimation using RRT Models under Two-Phase Simple & Stratified Random Sampling Designs” at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics at University of North Carolina – Greensboro, USA (07-09, October 2022).
  • Paper presented on “Improved Efficiency Through Mixture Quantitative Randomized Response Models” at the 2nd International Conference on Statistical Sciences-2022 “Applied Statistics & Sustainable Development Goals” held at GCU, Lahore (09-10, March 2022).
  • Paper presented on “Generalized RRT Mean Estimator using Two Auxiliary Variables in the Presence of Measurement Errors in Two-Phase Sampling” at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics (AISC) at University of North Carolina – Greensboro (UNCG), USA (09, October, 2021).
  • Fakhar, Sadia Khalil. (2021). presented research work in a Poster Competition held at Department of Statistics LCWU Lahore (27, October, 2021).
  • Kashaf, Sadia Khalil. (2021). Presented research work in a Poster Competition held at Department of Statistics LCWU Lahore (27, October, 2021).
  • Participated as a mentor for our student Usra Shuja, in an online International Conference “The 16th annual UNCG Regional Mathematics and Statistics Conference” (14, November 2020). Usra Shuja made a virtual presentation under my supervision.
  • Research Presentation on “Impact of Measurement Errors on Mean Estimation using Randomized Data” to the Sampling Research Group at University of North Carolina – Greensboro (UNCG), USA (28, June 2019).
  • Paper presented on “Mean Estimation of Sensitive Variables under Measurement Errors using Optional RRT Models” at the International Conference on Advances in Interdisciplinary Statistics and Combinatorics at University of North Carolina – Greensboro, USA (05-07, October 2018).
  • Paper presented on “Estimation of population mean for a sensitive variable in the presence of measurement error” at 16th International Conference on Statistical Sciences: Advances in Statistics and Data Management, Its role in national growth and socio-economic development, at Islamia College, Peshawar, Pakistan (05-08, March, 2018)
 

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