الأساليب الإحصائية في تقدير أحجام العينات في علوم الإعلام والاتصال

Abstract

 the sample size estimation is an important step that a researcher faces during his work, and many researchers make mistakes leading to a wrong estimation of sample size, this will directly and negatively affect the validity of his/her results and the ability to generalize them on the study population. Our paper aims to shed the light on all aspects of the sample such as concepts, methods and statistical equations in order to activate its use in field research of mass media and communication sciences specifically in both post-graduation and advanced studies ( Master and Phd), The most important finding that we reached through the results is that the equations used in the sample size estimation are appropriate only for random sampling, they are also valid with quantative public studies not qualitative studies, mass media and communication studies such as series, articles, caricatures and others. Key words: statistical methods, sample size, estimation of the sample size, samples in information and communication sciences.