Analysis of the focal relationship of level five leadership with school organizational excellence by Hosein Majooni, Siroos Ghanbari

“…According to the classes of the research society such as the type of region (rich, semi-rich and deprived), the number of cities/districts (39), and gender (male and female) by proportional stratified random sampling method and based on the Cochran formula, a sample of 375 people was selected. …”
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