Two statistical criterion of check of the consent of the distribution function of sampling with the Gaussian (normal) distribution function are studied: compound criterion on the GOST 8.207-76 base and Shapiro-Wilke criterion. The most relevant for practice case - an event of small samplings by a volume less than 50 is reviewed. Percent of rejected by researched criterion sampling of a different volume with different kinds of distributions functions is calculated by the Monte-Carlo method. The analysis is carried out and recommendation on criterion usage in practice is given.