Quantile regression-ratio-type estimators for mean estimation under complete and partial auxiliary information

U Shahzad, M Hanif, I Sajjad, MM Anas - Scientia Iranica, 2022 - scientiairanica.sharif.edu
Traditional ordinary least square (OLS) regression is commonly utilized to develop
regressionratio-type estimators with traditional measures of location. Abid et al.(2016b) …

On mixed memory control charts based on auxiliary information for efficient process monitoring

SM Anwar, M Aslam, M Riaz… - Quality and Reliability …, 2020 - Wiley Online Library
Control charts are popular monitoring tools in statistical process control toolkit. These are
used to identify assignable causes in the process parameters (location and/or dispersion) …

Three-fold utilization of supplementary information for mean estimation under median ranked set sampling scheme

U Shahzad, I Ahmad, IM Almanjahie, AI Al-Omari - Plos one, 2022 - journals.plos.org
Ranked set sampling (RSS) has created a broad interest among researchers and it is still a
unique research topic. It has at long last begun to find its way into practical applications …

[PDF][PDF] L-Moments Based Calibrated Variance Estimators Using Double Stratified Sampling.

U Shahzad, I Ahmad, IM Almanjahie… - Computers, Materials & …, 2021 - researchgate.net
Variance is one of the most vital measures of dispersion widely employed in practical
aspects. A commonly used approach for variance estimation is the traditional method of …

[PDF][PDF] Mean estimation using robust quantile regression with two auxiliary variables

U Shahzad, I Ahmad, IM Almanjahie… - Scientia …, 2023 - scientiairanica.sharif.edu
In the presence of outliers in the data set, the utilization of robust regression tools for mean
estimationis a widely established practice in survey sampling with single auxiliary variable …

An exponential family of median based estimators for mean estimation with simple random sampling scheme

U Shahzad, NH Al-Noor, M Hanif… - … in Statistics-Theory and …, 2021 - Taylor & Francis
Recently, Irfan et al. developed ratio-type estimators for population mean estimation with
simple random sampling (SRS) scheme, based on known median of a study variable and an …

Improved ratio estimators of variance based on robust measures

M Abid, S Ahmed, M Tahir, H Zafar Nazir… - Scientia …, 2019 - scientiairanica.sharif.edu
In this study, we develop some new estimators for estimating the population variance by
utilizing the information on midrange and inter decile range of an auxiliary variable. A …

Robust estimation of the population mean using quantile regression under systematic sampling

U Shahzad, I Ahmad, NH Al-Noor, M Hanif… - Mathematical …, 2023 - Taylor & Francis
Regression ratio mean estimators of a study variable Y are defined as the coefficients
provided by the ordinary least-squares regression of Y on a given auxiliary variable X. They …

Enhancing efficiency of ratio-type estimators of population variance by a combination of information on robust location measures

F Naz, M Abid, T Nawaz, T Pang - Scientia Iranica, 2020 - scientiairanica.sharif.edu
Numerous ratio-type estimators of the population variance are proposed in the existing
literature based on different characteristics of the study as well as the auxiliary variable …

New family of estimators for population mean using regression-cum-ratio exponential estimators

SK Yadav, C Kadilar… - International Journal of …, 2021 - inderscienceonline.com
Sampling is inevitable whenever the population is vast, and one estimates the population
mean rather than to calculate it. This article improves the estimation for the population mean …