Khoshnevisan et al. (2007) proposed a general family of estimators for population mean using known value of some population parameters in simple random sampling. The objective of this paper is to propose a family of combined-type estimators in stratified random sampling adapting the family of estimators proposed by Khoshnevisan et al. (2007) under non-response. The properties of proposed family...

The abrupt closure of universities in 2020 because COVID-19 forced many them to adopt online learning through various technological platforms. Institutional repositories (IRs), digital archives intellectual outputs universities, could be important education. However, there is a dearth empirical data on their ability support teaching, and research universities. This study aimed investigate the r...

purpose: this research aims at investigating the role of ict on improving organizational performance in academic libraries of state universities in isfahan based on the balanced scorecard. method: the research method is descriptive survey study. the population consists of all 169 librarians of the university of isfahan, isfahan technical university and isfahan medical sciences university. the s...

the main purpose of this descriptive-survey study was to investigate the problems of applying cell phone in delivering agricultural consultancy, technical and engineering services. the statistical population of the study consisted of 218 experts working in agricultural consulting, technical and engineering service ventures in zanjan province. according to the kjercie and morgan table, a sample ...

Validation data are often used to evaluate the performance of a trained neural network and used in the selection of a network deemed optimal for the task at-hand. Optimality is commonly assessed with a measure, such as overall classification accuracy. The latter is often calculated directly from a confusion matrix showing the counts of cases in the validation set with particular labelling prope...