Barros, Víctor ManuelGallegos Zurita, Diana ErciliaPavón Brito, Christian Antonio2019-06-042019-06-042018Revista Lasallista de Investigación Vol. 15 No 2 20181794-4449http://hdl.handle.net/10567/2318Introduction. This work is part of the development of a project that aims to characterize the state of the teaching of Experimental Physics in educational institutions of the middle level of the city of Guayaquil. Objective. Determine a sample for data collection by means of a survey about Experimental Physics in Guayaquil. Materials and methods. The study population was delimited and a random sampling combined with a stratified sampling was carried out. Results. It should be noted 192 educational institutions of high school level as a representative sample of the 384 that make up the population. With this information, the proportion of institutions for each district was calculated. Conclusion. This is not the only way to calculate the size of the sample, however, it is necessary to inform the procedures used in this process, which allows the reader to make their own judgment about whether they accept the assumptions of the research group and procedures.esAcceso abiertoCorporación Universitaria LasallistaFísicaMetodología de la educaciónInnovación educativaArticleinfo:eu-repo/semantics/openAcces