نتایج جستجو برای: simple random sampling was used first
تعداد نتایج: 6053876 فیلتر نتایج به سال:
this study aimed to explain the role of self-leadership and self-management on human capital of ministry of c.l and s.w. the research method was descriptive and correlational and data analysis metod was sem that using cochran's sampling formula that sample size was determined 306 personnel by simple random sampling. self-leadership and self-management of abili and mazari (2014) with reliab...
Introduction: The use of narcotics during pregnancy is accompanied by injuries such as preterm delivery, low birth weight and severe complications such as birth defects, which can lead to increased stress, decreased self-regulation and hospitalization in infants with the escalation of stress caused by the environment in these infants, there is a need for an evolutionary care approach. Swaddlers...
Some ratio estimators for estimating the population mean of the variable under study, which make use of information regarding the population proportion possessing certain attribute, are proposed. Under simple random sampling without replacement (SRSWOR) scheme, the expressions of bias and mean-squared error (MSE) up to the first order of approximation are derived. The results obtained have been...
In this paper, we proposed a new quality control chart for the sample mean based on a cost free and anti wasting sampling unit’s scheme known by the folded ranked set sampling (FRSS). The new control charts were compared with the classical control charts when the data obtained by using simple random sampling (SRS) and ranked set sampling (RSS). A simulation study showed that the FRSS based cont...
abstract present research considered to examine and compare shahrray 14 years girls and boys narrative concerning with their responsibilities in this research, statistical society are 14 years girls and boys of shahrry . for performing this research. first, 14 years of 50 boys and 50 girls were selected in accidental method and have filled memati hormaled adolescents responsibility questioner...
The problem of making statistical inference about P(Y<X) has been under great investigation in the literature using simple random sampling (SRS) data. This problem arises naturally in the area of reliability for a system with strength X and stress Y. In this study, we will consider making statistical inference about using ranked set sampling (RSS) data. Several estimators are proposed to estima...
Most of estimation methods reported in the literature are based on simple random sampling (SRS), which to certain extent is considerably less effective in estimating the parameters as compared to a new sampling technique, ranked set sampling (RSS) and its modifications. In this Paper we address the problem of Bayesian estimation of the parameters for Weibull distribution, based on ranked set sa...
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