Concordance Between the Size of the Sign and the Errors of First and Second Kind to Investigations in Medicine

Background: the relationship between sample size and errors of the first and second type, which are taken in those studies, where there are properly supported hypotheses, who is detailed in the classical literature; but without indicating a design of the methodology to follow. These analytical resources, as well as the ways to obtain the experimental data. Aims: to design a methodology to establish the concordance between the sample size, such as clinical trials, controlled and randomized studies in medicine. Method: statistical methods, procedures, and algorithms are applied, combined with theoretical methods: analysis-synthesis, induction-deduction, and abstraction-concretion to determine the size of the sample. The empirical methods applied are framed mainly in the observation of the records of the experimental data. The document review method is used, through books, and articles referring. Results: a methodology is designed, in which the correspondence between the minimum size of the sample. Conclusions: through elaborated health situations, the need to establish a methodology as a work tool to determine the concordance between the sample size, the errors of the first and second gender is evidenced; in research with a predetermined significance level, based on experimental data in clinical trials, controlled and randomized studies in medicine.