Dr.S. Arumairajan

Dr.S.-Arumairajan

Dr.S.Arumairajan

B.Sc. [Hons] (Jaffna), Ph.D(Pera).

  • Senior Lecturer in Mathematics
  • arumais@gmail.com
  • 0784807398
Google Scholar
  • Ph.D. in Statistics (Peradeniya.)
  • B.Sc. (Hons) in Statistics (University of Jaffna, Sri Lanka.)
  • Member of Science Faculty Research Committee.
  • Member of Sub-Committee for M.Sc. in Science Education programme.

  • STA102G2- Introduction to Statistics.

  • STA202G2-Sampling Techniques.

  • STA323GE2 –Quality Control.

  • STA425ME3-Advanced Statistical Theory.

  • STA403XS3-Applied Multivariate Analysis for Real World Data.

2020

  • Herath, H.M.C.M, and S.Arumairajan, S. Statistical Modeling of Reselling Price of Suzuki Model Used Car in Colombo District. Proceedings of the International Research Conference of Uva Wellassa University, July 29-30, 2020, p.p.193.

2019

2018

  • Arumairajan, S. On the Stochastic Restricted Modified Almost Unbiased Liu Estimator in Linear Regression Model. Commun. Math. Stat. 6, 185–206 (2018).

2017

  • Arumairajan, S., Wijekoon, P. Modified Almost Unbiased Liu Estimator in Linear Regression Model. Commun. Math. Stat. 5, 261–276 (2017). https://doi.org/10.1007/s40304-017-0111-z

  • Arumairajan, S., Wijekoon, P. The generalized preliminary test estimator when different sets of stochastic restrictions are available. Stat Papers 58, 729–747 (2017).

  • Arumairajan, S (2017). Monte Carlo evaluation of Principal component type estimators in the linear regression model, Asia-Pacific Multidisciplinary Research Conference (APMR) at Colombo, Sri Lanka, p.p. 35.

  • Wickramarathna, W.A.D.S., Varathan, N. and Arumairajan, S. (2017). Time Series Modeling of Tea Production of Sri Lanka, Vavuniya Campus International Research Symposium (VCIRS), at Vavuniya Campus of the University of Jaffna, Sri Lanka. (Presented by W.A.D.S.Wickramarathna)

  • Yasapala, A.G.P.D.Y. and Arumairajan, S. (2017).  Factors affecting on the BMI of the students in the University of Jaffna, Sri Lanka, Sixth Annual Science Research Sessions at Faculty of Applied Science, South Easter University of Sri Lanka, p.p. 02.. (Presented by Yasapala, A.G.P.D.Y.)

2016

  • Arumairajan. S and Wijekoon. P (2016). The Principal Component Preliminary Test Estimator in the Linear Regression Model, Journal of Modern Applied Statistical Methods, 15(1).

  • S.Arumairajan & P.Wijekoon (2016) Generalized preliminary test stochastic restricted estimator in the linear regression model, Communications in Statistics – Theory and Methods, 45:20, 6061-6086, DOI: 10.1080/03610926.2014.957850

2015

  • Arumairajan, S.and Wijekoon, P.(2015) Optimal Generalized Biased Estimator in Linear Regression Model. Open Journal of Statistics, 5, 403-411. doi: 10.4236/ojs.2015.55042.

  • Arumairajan, S. and Wijekoon, P. (2015) More on the Preliminary Test Stochastic Restricted Liu Estimator in Linear Regression Model. Open Journal of Statistics, 5, 340-349. doi: 10.4236/ojs.2015.54035.

  • Arumairajan. S and Wijekoon. P (2015). Preliminary Test Stochastic Restricted r-k Class Estimator and Preliminary Test Stochastic Restricted r-d Class Estimator in Linear Regression Model, British Journal of Mathematics and Computer Science, Vol.5, No.2, p.p.204-227.

2014

  • Arumairajan. S and Wijekoon. P (2014). Improvement of Ridge estimator when stochastic restrictions are available in the linear regression model. Journal of Statistical and Econometric Methods, Vol. 3, No. 1, 35-48.

  • Wijekoon. P and Arumairajan. S (2014). Recent Advances in Preliminary Test Estimator in Linear Regression Model, Institute of Applied Statistics Sri Lanka (IASSL) International Conference, p.p.130.Arumairajan. S and Wijekoon. P (2014).

  • Generalized Biased Estimators in Linear Regression Model, Institute of Applied Statistics Sri Lanka (IASSL) International Conference, p.p.129.

  • Arumairajan. S and Wijekoon. P (2014). Mean square error matrix comparison between two biased estimators in the linear regression model, proceeding of the PGIS Congress, p.p.39.

  • Arumairajan. S and Wijekoon. P (2014). A Ridge Type Preliminary Test Estimator in the Linear Regression Model, Proceedings of the International Peradeniya University Research Session (IPURSE), Vol.18.

2013

  • Arumairajan. S and P.Wijekoon. P (2013). Improvement of the Preliminary Test Estimator When Stochastic Restrictions are Available in Linear Regression Model, Open Journal of Statistics, Vol. 3, No. 4, p.p. 283-292.(doi:10.4236/ojs.2013.34033).

2012

  • Arumairajan. S and Wijekoon. P (2012). Preliminary Test Stochastic Restricted Liu Estimator Based on Wald, Likelihood Ratio and Lagrangian Multiplier Tests in the Linear Regression Model, Proceedings of the Peradeniya University Research Session (PURSE), Vol.17, July, p.p.167.