Stratified random sampling (SRS) is a fundamental sampling technique that provides accurate estimates for aggregate queries using a small size sample, and has been used widely for approximate query processing. A key question in SRS is how to partition a target sample size among different strata. While Neyman allocation provides a solution that minimizes the variance of an estimate using this sa...

This study aims to analyze the relationship between nutritional status, type and duration of contraceptive pills, 1-month injection Depo Medroxy Progesterone Acetate (DMPA) with menstrual disorders in women childbearing age Kupang City. The method used is a quantitative cross-sectional design. sampling technique was simple random stratified sampling. results showed that there status value (P = ...

Generating sample models for testing a model transformation is no easy task. This paper explores the use of classifying terms and stratified sampling for developing richer test cases for model transformations. Classifying terms are used to define the equivalence classes that characterize the relevant subgroups for the test cases. From each equivalence class of object models, several representat...

The purpose of this study was to identify factors that effecting on wood and papers student’s entrepreneurial spirit. Statistical population of this research consisted of whole wood and paper students in college of agricultural and natural of Tehran University (N= 263). A stratified random sampling method was used to select 100 students applying Morgan’s table. The main tool to collect data was...

We assessed depression among 300 elderly Sudanese (age 60+ years). We conducted a cross-sectional household survey in 3 localities in Khartoum State. A 2-stage stratified sampling was carried out to select the localities and then the areas using simple random sampling; then systematic random sampling was used to select households. The prevalence of depression was 47.5%. Depression was significa...

The purpose of the study was to analyze role agility, work discipline, communication skills and intellectual intelligence on performance BPR-BKK Demak Regency employees. population in this were employees PT. BPR BKK with a total 148 people. sampling technique used proportionate stratified random sampling. Determination number samples determined by Slovin formula obtained 60 respondents. Sources...

Stratified sampling is often used in opinion polls to reduce standard errors, and it is known as variance reduction technique in sampling theory. The most common approach of resampling method is based on bootstrapping the dataset with replacement. A main purpose of this work is to investigate extensions of the resampling methods in classification problems, specifically we use decision trees, fr...

the present study aimed at presenting a model of knowledge management success in order to increase organizational creativity and learning in the ministry of sport and youth of iran. the study was a survey which used a correlation method. the statistical population consisted of expert staff of the ministry and 160 subjects were randomly selected by stratified random sampling method. a research-m...