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In the most of recent Iranian literary researches which use statistical analyses, only a specific part of statistics, i.e. descriptive statistics, is used. It seems that another important part (inferential statistics) is missed in these researches. SPSS is a powerful software package used for statistical analysis in social sciences.This software , at first, is designed for statistical analyzes at social sciences but for it's easy environment , it spread between users and With the increasing needs of users, the abilities of software increase too. One of the most important capabilities of it is doing inferential statistics. Almost all kinds of statistical analyses may be done by it. This paper tries to introduce SPSS to the researchers of literature and show the weaknesses of some literary researches and suggests to this group of researchers to use the methods of inferential statistics which are more accurate than the methods of descriptive statistics.

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One of the steps of a research is hypothesizing that have been argued about its necessity and method in humanities. With investigating literary studies, it may be said that hypotheses haven’t any function in the research process. Critiquing the position and concept of hypotheses in literary researches, in this paper, we trace answers to these questions: why don’t hypotheses have any function in solving literary problems? Can we define a type of the hypotheses for these studies? There is a methodological difference between the concept of literary theory and theory in empirical methods. This different cause hypothesis in literary researches to lacks some properties such as Testability. In other words, due to dependence of literary researches and theories on reading, hypothesizing in literary studies is a useless and, sometimes, impossible task. Considering the implicit hypotheses instead of explicit and conventional one, maybe, we can produce a difference treatment of hypotheses for literary studies. Implicit hypotheses are not presented in the shape of a sentence, relate to step of text selecting and knot at the whole of research process.