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178.050  Articles
1 of 17.805 pages  |  10  records  |  more records»
We proposed an alternative two-phase stratified ranked set sampling. A comparison of the performances of the proposed estimators made by simulation studies using both real tree data collected by Platt et al. (1988) and generated bivariate normal data. It ... see more

The present article offers more efficient imputation based estimators of the population mean under the framework of two-phase sampling in presence of an auxiliary variable. The theoretical conditions stating superiority of the proposed estimators, over so... see more

In this paper, two new control charts have been proposed, one is shewhart-type and other one is EWMA-type control chart. The proposed control charts are based on the exponential type estimator for mean proposed by Noor-ul-Amin and Hanif (2012). We name th... see more

This  paper  discusses   on  the  estimation  of  a finite  population  mean  using  a  two-phase  sampling mechanism  in the presence of two auxiliary variables. Under  the u... see more

The present investigation deals with the problem of estimation of population variance in presence of random non-response in two-phase (double) sampling. Using information on two auxiliary variables, two general classes of estimators have been suggested in... see more

This paper deals with the problem of estimation of population mean in two-phase sampling. A ratio-product estimator of population mean using known coefficient of kurtosis of two auxiliary variates has been proposed. In fact, it is a two-phase sampling ver... see more

This study is devoted to obtain an ecient estima-tor for population mean in two-phase sampling using two auxiliary variables following Vishwakarma and Kumar (2014). Expressions for bias and mean squared error(MSE) are obtained to rst or-der of a... see more

Mobile phones are widely used by university students and there is a controversial topic whether students should be able to use them freely during lectures. A survey was distributed seeking student opinions on using mobile phones in classroom. We used two-... see more

This article aims to examine curriculum advisors’ and teachers’ perceptions of teaching early reading in Foundation Phase classrooms. It also aims to provide recommendations to alleviate overlaps based on the findings. A qualitative approach was used to g... see more

1 of 17.805 pages  |  10  records  |  more records»