Results 21 to 30 of about 137,004 (252)

Sampling of cashew nuts as an aid to research for the genetic improvement of cashew tree [PDF]

open access: yesPesquisa Agropecuária Brasileira, 2019
: The objective of this work was to estimate sample sizes of cashew (Anacardium occidentale) nuts as an aid to the genetic improvement of cashew tree. Nuts were separated by size: nuts < 17 mm were classified as size 1 (S1); 17 mm ≤ nuts < 19 mm, size 2 (
Adroaldo Guimarães Rossetti   +2 more
doaj   +1 more source

A new Separated Ratio Estimator in the stratified random sampling [PDF]

open access: yesالمجلة العراقية للعلوم الاحصائية, 2009
The aim of this research is to find a new separated ratio estimator in the stratified random sampling ,three other estimators are compared with the new separated ratio estimator , namely : ordinary separated ratio estimator , combined ratio estimator ...
doaj   +1 more source

Partial stratified ranked set sampling scheme for estimation of population mean and median

open access: yesPLoS ONE, 2023
Ranked set sampling is an alternative to simple random sampling, which uses the least amount of money and time. The ranked set sampling (RSS) is modified to obtain a more efficient and cost-effective estimator of population parameters. This paper aims to
Maria M   +3 more
doaj   +2 more sources

Estimation of Coefficient of Variation Using Calibrated Estimators in Double Stratified Random Sampling

open access: yesMathematics, 2023
One of the most useful indicators of relative dispersion is the coefficient of variation. The characteristics of the coefficient of variation have contributed to its widespread use in most scientific and academic disciplines, with real life applications.
Usman Shahzad   +5 more
doaj   +1 more source

PENETAPAN BOBOT TIMBULAN SAMPAH RUMAH TANGGA DI TIGA LINGKUNGAN DI KELURAHAN BANTAN KECAMATAN MEDAN TEMBUNG KOTA MEDAN

open access: yesBioLink, 2017
This reseach aims was to find out how much of the total solid waste generated both organic and inorganic solid waste weight calculation is done in the village Batan.
Zakki Rizkiyah   +2 more
doaj   +1 more source

Generalized Power Transformation Estimators in Stratified Ranked Set Sampling using Auxiliary Information

open access: yesInternational Journal of Bio-Resource and Stress Management, 2023
Auxiliary variable is commonly used in survey sampling to improve the precision of estimates. Whenever there is auxiliary information available, the researchers want to utilize it in the method of estimation to obtain the most efficient estimator ...
Nitu Mehta (Ranka), Latika Sharma
doaj   +1 more source

Assessing the Accuracy of Multi-Temporal GlobeLand30 Products in China Using a Spatiotemporal Stratified Sampling Method

open access: yesRemote Sensing, 2023
The new type of multi-temporal global land use data with multiple classes is able to provide information on both the different land covers and their temporal changes; furthermore, it is able to contribute to many applications, such as those involving ...
Yali Gong   +6 more
doaj   +1 more source

Cat swarm optimization for the determination of strata boundaries [PDF]

open access: yesYugoslav Journal of Operations Research, 2023
A stratified random sampling method is preferred for selecting varied populations with outliers. As opposed to plain random sampling, stratified sampling increases statistical precision by reducing estimator variance.
Jasim Raghad M.
doaj   +1 more source

Stratification in Business and Agriculture Surveys with R [PDF]

open access: yesRevista Română de Statistică, 2016
Usually sample surveys on enterprises and farms adopt a one stage stratified sampling design. In practice the sampling frame is divided in non-overlapping strata and simple random sampling is carried out independently in each stratum.
Marco Ballin   +3 more
doaj  

Novel imputation methods under stratified simple random sampling

open access: yesAlexandria Engineering Journal
This paper addresses some classes of combined and separate imputation methods (CSIMs) of the population mean under stratified simple random sampling (SSRS) along with their characteristics.
Anoop Kumar   +5 more
doaj   +1 more source

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