Research Interests:
Sequential Analysis, Statistical Inference, Statistical Reliability Theory, Statistical Quality Control
Ongoing Research Projects:
Project Title: Improved Estimation of Regression Parameters Using Adaptive Sampling Strategies with Applications
Funding Agency: Planning Unit, Indian Institute of Technology Delhi
Grant Name: New Faculty Seed Grant (NFSG)
Sanctioned Budget: INR 20,00,000
Duration: Feb 12, 2024 - Feb 11, 2027
Refereed Journal Articles:
2025
Rajput, A. and Joshi, N. (2025). On testing the ratio of scale parameters of two Pareto distributions using a novel accelerated sequential sampling technique with applications. Sequential Analysis, Accepted for Publication.
Joshi, N., Bapat, S.R., and Sengupta, R.N. (2025). Two-stage and purely sequential minimum risk point estimation of the scale parameter of a family of distributions under modified LINEX loss plus sampling cost. Metrika, 88(5): 689-707.
Chaturvedi, A., Joshi, N., Bapat, S.R., and Nadarajah, S. (2025). Control Charts for the Percentiles of an Inverse Pareto Distribution Under Complete and Middle-Censored Data. Quality and Reliability Engineering International, 41(5): 1971-1984.
Chaturvedi, A., Bhatti, M.I., Bapat, S.R., and Joshi, N. (2025). Modeling wind speed data using the generalized positive exponential family of distributions. Modeling Earth Systems and Environment, 11(2): 98.
2024
Bapat, S.R., and Joshi, N. (2024). Optimal Estimation of the Length-Biased Inverse Gaussian Mean with a Case Study on Eastern Tropical Pacific Dolphins. Environmental and Ecological Statistics, 31(3): 675-689.
Joshi, N., Bapat, S.R., and Sengupta, R.N. (2024). Optimal Estimation of Reliability Parameter for Inverse Pareto Distribution with Application to Insurance Data. International Journal of Quality & Reliability Management, 41(7): 1811-1837.
Sengupta, R.N., Bapat, S.R., and Joshi, N. (2024). Sequential Estimation for the Multiple Linear Regression Models with Balanced Loss Functions. Sequential Analysis, 43(2): 211-232.
Joshi, N., Bapat, S.R., and Sengupta, R.N. (2024). Estimation of fixed-accuracy confidence interval of the stress-strength reliability for inverse Pareto distribution using two-stage sampling technique. Sequential Analysis, 43(1): 79-102.
2023
Bapat, S.R., Joshi, N., and Shukla, A.K. (2023). On Fixed-Accuracy Confidence Intervals for the Parameters of Lindley Distribution and Its Extensions. Austrian Journal of Statistics, 52(2): 104-115.
2022
Joshi, N., Bapat, S.R., and Shukla, A.K. (2022). Multi-Stage Estimation Methodologies for an Inverse Gaussian Mean with Known Coefficient of Variation. American Journal of Mathematical and Management Sciences, 41(4): 334-349.
Joshi, N. and Bapat, S.R. (2022). On improved accelerated sequential estimation of the mean of an inverse Gaussian distribution. Communications in Statistics - Theory and Methods, 51(17): 6127-6143.
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2022). Sequential Estimation of an Inverse Gaussian Mean with Known Coefficient of Variation. Sankhya B, 84(1): 402-420.
2021
Joshi, N. and Bapat, S.R. (2021). On a class of purely sequential procedures with applications to estimation and ranking and selection problems. Sequential Analysis, 40(4): 482-500.
Joshi, N., Bapat, S.R., and Shukla, A.K. (2021). A class of accelerated sequential procedures with applications to estimation problems for some distributions useful in reliability theory. Communications for Statistical Applications and Methods, 28(5): 563-582.
Chaturvedi, A., Chattopadhyay, S., Bapat, S.R., and Joshi, N. (2021). Sequential point estimation procedures for the parameter of a family of distributions. Communications in Statistics - Simulation and Computation, 50(9): 2678-2704.
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2021). Two-stage and sequential procedures for estimation of powers of parameter of a family of distributions. Sequential Analysis, 40(2): 170-197.
2020
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2020). Purely Sequential and k-Stage Procedures for Estimating the Mean of an Inverse Gaussian Distribution. Methodology and Computing in Applied Probability, 22(3): 1193-1219.
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2020). Second-order approximations for a multivariate analog of Behrens-Fisher problem through three-stage procedure. Communications in Statistics - Theory and Methods, 49(14): 3466-3480.
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2020). Sequential Minimum Risk Point Estimation of the Parameters of an Inverse Gaussian Distribution. American Journal of Mathematical and Management Sciences, 39(1): 20-40.
2019
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2019). A k-stage procedure for estimating the mean vector of a multivariate normal population. Sequential Analysis, 38(3): 369-384.
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2019). Multi-stage procedures for the minimum risk and bounded risk point estimation of the location of negative exponential distribution under the modified LINEX loss function. Sequential Analysis, 38(2): 135-162.
Chaturvedi, A., Bapat, S.R., and Joshi, N. (2019). Multi-stage point estimation of the mean of an inverse Gaussian distribution. Sequential Analysis, 38(1): 1-25.
Refereed Book Chapters in Edited Books:
2024
Bapat, S.R. and Joshi, N. (2024). Understanding Censoring Techniques in Business Analytics and Decision Making. In: R.N. Sengupta, B. Basu, J.K. Jha, and I. Mukherjee (Eds.), Data Science and Statistical Modeling in Business: Towards Operational and Business Excellence (Volume four of the Book Series titled Decision Sciences and Data Analytics for Operations and Business Excellence), Springer, Accepted for Publication.
Submitted Papers:
Joshi, N., Bapat, S.R., Chaturvedi, A., and Nadarajah, S. (2024+). Optimal estimation of the length-biased Pareto mean with case studies on Indian billionaires and Olympic marathon runners. Second round of major revision under preparation.