" Simple Random Sampling (SRS). Simple random sampling (SRS) is the primary sampling technique, which also serves as the basis for other techniques. Simple random sampling occurs when a sample size of n (for example, selected subset of eggs) from a population of size N (for example, total number of eggs produced on a farm on a given day) is taken in such a way that every possible sample of size...

the purpose of this study is to analyze the relationship between transformational leadership and job engagement by mediating role of psychological empowerment. concerning it’s purpose, the study is practical and considerate the data collection procedure it is a descriptive correlation study. the population of the study includes all kurdistan province education office staff (200 subjects) which ...

multistage stochastic programming is a key technology for making decisions over time in an uncertain environment. one of the promising areas in which this technology is implementable, is medium term planning of electricity production and trading where decision makers are typically faced with uncertain parameters (such as future demands and market prices) that can be described by stochastic proc...