The Total Operating Characteristic (TOC) measures how the ranks of an index variable distinguish between presence and absence in a binary reference variable. Previous methods to generate TOC required data derive from census or simple random sample. However, many researchers apply stratified sampling collect because is more efficient than for applications. Our manuscript derives new methodology ...

In this article, we propose an improved estimator for finite population variance based on stratified sampling by using the auxiliary variable as well rank of variable. Expressions bias and mean square error estimators are derived up to first order approximation. Four real data sets used measure performances estimators. Moreover, a simulation study is also conducted observe efficiency proposed e...

In this paper we investigate the problem of estimation finite population mean using auxiliary information. The aim is to modify a separate ratio estimator by calibration approach for stratified random sampling. We use improve precision estimate parameter incorporating chi-square distance function minimize between original design weight and new weight. two constraints called equations find weigh...

The precision of parameters estimation are determined by the sample size and the sampling design used in a study. Due to such practical constraints as the budget and manpower, most large-scale educational studies would not adopt the simple random sampling design. TIMSS 2007 used a two-stage stratified cluster sampling design. In the first stage, about 150 schools were selected according to some...

The experiments were conducted for monitoring crop area by spatial sampling methods in a winter wheat main production region with a size of 42Km×42Km in Hengshui City, Hebei Province in China to optimize designs of the frameworks and elements (sample size, sample-square dimension), based on Remote Sensing (RS) and Geographical Information System (GIS) techniques. 5 sample-square dimension level...

Disturbing sounds are often referred to as noise, and if extreme enough in degree, intensity or frequency, it is referred to as noise pollution. Achievement refers to a change in study behavior in relation to their noise sensitivity and learning in the educational sense by achieving results in changed responses to certain types of stimuli like noise sensitivity.It is the more specialized skills...

The purposes of this study were to present a conceptual model for selection into the early childhood profession and to test the model using contemporaneous assessments. A stratified random sample of center-based child care providers in 4 Midwestern states (n = 964) participated in a telephone interview, and 223 were also assessed with the Early Childhood Environment Rating Scale—Revised or the ...

In health research, socioeconomic position (SEP) is used to measure the context of social inequality. Studies on low birth weight (LBW) that attempt to capture social inequality have generally used single measures of SEP or have employed conventional SEP measures, such as income and education, without regard to how other indicators could influence findings. This study investigates the associati...

OBJECTIVE To investigate the association between low functional health literacy (ability to read and understand basic health related information) and mortality in older adults. DESIGN Population based longitudinal cohort study based on a stratified random sample of households. SETTING England. PARTICIPANTS 7857 adults aged 52 or more who participated in the second wave (2004-5) of the Eng...

Genome enabled prediction provides breeders with the means to increase the number of genotypes that can be evaluated for selection. One of the major challenges in genome enabled prediction is how to construct a training set of genotypes from a calibration set that represents the target population of genotypes, where the calibration set is composed of a training and validation set. A random samp...