Results 11 to 20 of about 160,574 (220)

Dual Transformation of Auxiliary Variables by Using Outliers in Stratified Random Sampling

Mathematics
To estimate the finite population variance of the study variable, this paper proposes an improved class of efficient estimators using different transformations. When both the minimum and maximum values of the auxiliary variable are known and the ranks of
Mohammed Ahmed Alomair, Umer Daraz
doaj   +1 more source

Improved Randomized Response in Optional Scrambling Models

Journal of Statistical Theory and Applications (JSTA), 2019
In the present study, we discuss the issue of increasing the respondents cooperation in sensitive surveys. When the question is highly sensitive then the cooperation from the respondents is decreased.
Zawar Hussain, Muhammad Imran Shahid
doaj   +1 more source

A comparison between various two-variable regression methods in order to estimate soil components using satellite data Case study: Abarkooh playa, Yazd [PDF]

جغرافیا و آمایش شهری منطقه‌ای, 2014
The study of relationship between various soil parameters and satellite data is an effective step in the identification and separation of desert facies.  To do so, this study  aim to study two-variable regression methods based on different relationships ...
Dr. Reza Ghezavi, Zohre Ebrahimi Khusfi, Dr. Mohammad Reza Ekhtesasi, Dr. Seyed Zeynolabedin Hosseini, Mohsen Ebrahimi Khusfi, Dr. Mohammad Hasanzadeh nafooti   +5 more
doaj   +1 more source

Neutrosophic regression type estimator for the finite population mean and its applications in real data scenarios

Frontiers in Applied Mathematics and Statistics
Research under classical statistics often relies on precise, determinate data to estimate population parameters. However, in certain situations, data may be indeterminate or imprecise.
Neha Purwar, Kaustav Aditya, B, Pankaj Das, Tauqueer Ahmad   +4 more
doaj   +1 more source

Adaptive multi-filter EKF framework for UAV tracking of ground robots in challenging terrains [PDF]

PeerJ Computer Science
Accurate relative pose estimation between uncrewed aerial vehicles (UAVs) and uncrewed ground vehicles (UGVs) in off-road, Global Positioning System (GPS)-denied settings remains difficult due to rough terrain, wheel slip, and sensor noise.
Muhammad Bilal Kadri, Sofia Yousuf
doaj   +2 more sources

Efficiency of the Ethiopian Health Extension Program: An Application of Data Envelopment Analysis [PDF]

Eurasian Journal of Business and Economics, 2017
This study aims at evaluating the relative technical efficiency and productivity of the Ethiopian rural health extension program, with an emphasis on rural health posts, using Data Envelopment Analysis and the Malmquist index for data obtained from ...
Yibrah Hagos GEBRESILASSIE, Phocenah NYATANGA   +1 more
doaj   +1 more source

Optimizing Finite Population Mean Estimation Using Simulation and Empirical Data

Mathematics
Two-phase sampling is an effective sampling approach that is useful in sample surveys when prior auxiliary information is not available. When two variables have an association, the ranks of the auxiliary variable are proportional to the study variable ...
Abdulaziz S. Alghamdi, Fatimah A. Almulhim   +1 more
doaj   +1 more source

Assessment of TiO2/ZnO/H2O2 Photocatalyst to treat wastewater from oil refinery within visible light circumstances

South African Journal of Chemical Engineering, 2021
This study examined the use of the ZnO/TiO2/H2O2 process in suspension mode under visible light (VL) (1000 W/m2) to reduce TOC from the real petroleum wastewater in Sohar Refinery Company (SRC).
Dheeaa al deen Atallah Aljuboury, Feroz Shaik   +1 more
doaj   +1 more source

On Hierarchical Composite Endpoints in Pediatric Cancer Supportive Care: Illustrative Examples From Two Multi‐Center Phase‐III Randomized Clinical Trials

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric supportive care clinical trials often involve multiple clinically important outcomes, complicating trial interpretation. Hierarchical composite endpoints (HCEs) provide a framework to integrate key outcomes according to clinical importance.
Willem H. Collier, Mark Zobeck, Adam J. Esbenshade, Christopher C. Dvorak, Lillian Sung, David Freyer, Sarah Alexander, Etan Orgel, Nicole J. Ullrich, Zach Prudowsky, Brian Fisher, Caitlin W. Elgarten   +11 more
wiley   +1 more source

Optimizing population mean estimation under ranked set sampling with applications to Engineering

Results in Engineering
This article aims to develop two novel mean estimators of finite populations under ranked set sampling. The suggested estimators result in a high-efficiency gain due to their efficient formulation by taking the linear combination of classical estimators ...
Muhammad Eisa, Muhammad Iqbal, Hameed Ali, Zafar Mahmood, Sami Znaidia   +4 more
doaj   +1 more source