Results 51 to 60 of about 3,160,245 (302)

Ratio estimator for the population mean using ranked set sampling

, 2009
Ratio estimator, Ranked set sampling, Simple random sampling, Efficiency, 62D05,
Cem Kadilar, Hulya Cingi, Yesim Unyazici, ÇINGI, HÜLYA, Unyazici, Yesim, KADILAR, CEM   +5 more
core   +2 more sources

Retrospective Analysis of Donor Lymphocyte Infusions in Pediatric Patients With Mixed Chimerism After Hematopoietic Stem Cell Transplantation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Allogeneic hematopoietic stem cell transplantation (alloHSCT) is an essential therapy for several malignant and nonmalignant diseases, but relapse and graft loss remain the principal threats to its success. Routine monitoring of chimerism and minimal residual disease (MRD) enables early detection of imminent recurrence and guides ...
Carmen Junk, Sebastian Michaelis, Michaela Döring, Thomas Eichholz, Ursula Holzer, Martin Ebinger, Tim Flaadt, Rupert Handgretinger, Peter Lang, Jan Frederic Weller, Markus Mezger   +10 more
wiley   +1 more source

Heuristic Algorithm for Obtaining Approximate Optimum Stratification With Mixture of Ratio and Product Estimators

IEEE Access
In this investigation, we examined the impact of employing simple random sampling on the stratification points pertaining to the two independent variables. The study focused on a variable (X) exhibiting a robust correlation, and we employed a combination
S. E. H. Rizvi, Faizan Danish, Rafia Jan, Ismail A. Mageed, Sumaya Al Maadeed, Jihad Mohamed Aljaam   +5 more
doaj   +1 more source

The Impact of the COVID‐19 Pandemic on Childhood Cancer Survival: A Population‐Based Assessment of Survival Patterns Between 2015 and 2023 in Germany

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Numerous international studies have reported declines in new cancer diagnoses, delayed diagnoses and disruptions in cancer treatment following the implementation of COVID‐19 pandemic public health measures, raising concerns that these effects may ultimately contribute to increased cancer mortality.
Friederike Erdmann, Maike Wellbrock, Javier Louro, Arndt Borkhardt, Martin Schrappe, Claudia Trübenbach, Desiree Grabow, Cécile M. Ronckers, Joachim Schüz   +8 more
wiley   +1 more source

Efficient transformed ratio-type estimator using single auxiliary information

Kuwait Journal of Science, 2021
This paper purposes an efficient transformed ratio-type estimator for the estimation of population variance of study variable (y) by utilizing single auxiliary information (x) under simple random sampling without-replacement.
Sana Amjad, Ismail Muhammad
doaj   +1 more source

Composite Estimators for the Population Mean Under Ranked Set Sampling

Mathematics
Ranked Set Sampling (RSS) is an effective sampling technique, particularly when precise measurement of the study variable is costly or time-consuming, but ranking the units is relatively easy.
Sayed A. Mostafa, Thomas Johnson, Sanford Jennings   +2 more
doaj   +1 more source

Venetoclax‐Based Therapy as a Bridge to Hematopoietic Stem Cell Transplantation in Relapsed or Refractory Pediatric Acute Leukemia

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Relapsed and/or refractory (R/R) pediatric acute leukemia carries a dismal prognosis, largely driven by chemoresistance to conventional salvage therapy. The BH3‐mimetic venetoclax, combined with chemotherapy or hypomethylating agents, has demonstrated efficacy in small clinical trials.
Katherine S. Colman, Deborah Meyran, Vajiranee Malalasekera, Heather Weerdenburg, Janine Campbell, Rachel Conyers, Stacie Wang, Hannah Walker, Seong Lin Khaw, Diane Hanna   +9 more
wiley   +1 more source

Development of Efficient Transformed Ratio-Type Estimators for Finite Population Mean with Engineering Applications

Mathematics
The efficient estimation of a finite-population mean can be materially improved when reliable auxiliary information is available and appropriately incorporated into the estimator.
Abdulrahman Obaid Alshammari
doaj   +1 more source

On regression estimators of the ratio and their applications

Lietuvos matematikos rinkinys, 1997
There is not abstract.
Gražvydas Klimavičius, Danutė Krapavickaitė, Aleksandras Plikusas   +2 more
openaire   +2 more sources

Ratio Type Estimator of Ratio of Two Population Means in Stratified Random Sampling [PDF]

, 2012
A ratio estimator is proposed for the ratio of two population means using auxiliary information in stratified random sampling. Bias and mean squared error expressions are obtained under large sample approximation, and the proposed estimator is compared ...
Tailor, Rajesh, Rajesh Tailor, Sunil Chouhan, Chouhan, Sunil   +3 more
core   +1 more source