Problems of research sample and testing the null hypothesis

Problems of research sample and testing the null hypothesis R. Cuberek, K. Fromel The paper points to the methodological approach of authors to the research. In seven selected Czech journals (6 peer-reviewed kinanthropological ones and one psychological journal with an impact factor), the statistical testing of null hypothesis was assessed. The results show a serious defect in fulfillment the condition for the use of this statistical instrument the randomization of the sample. The incorrect interpretation of concepts level of statistical significance" and type one error" is evident being the result of unclear conception of statistical significance testing. In many studies using this statistical instrument the results are based on wrong methodology and their conclusiveness is thus low. The authors emphasize the approach of editorial boards of scientific journals to the quality of manuscripts: requirements concerning the "method" and "discussion" parts, and shifting review criteria to the worldwide accepted level.