It may be aimed at evaluating specific attributes of the investigated marketing phenomenon. Thus, the researcher can follow the determination of the frequency of visit of a commercial unit and the appropriate indicator describing this variable to be the weekly average frequency of visiting the group in question, in the specialized literature, the choice of this alternative is designated under the concept of sampling in relation to the variables investigated. It can monitor the measurement of variables and determine specific indicators that express their evolution. The use of statistical formulas for determining the sample size implies, first of all, the choice of a significant benchmark for the measures to be made based on the results provided by the qualitative research to be performed, usually, the researcher has, in this sense, two alternatives: The sample size, in this case, will be given by the number of people in that age group that will be surveyed. By sample size, we understand a group of subjects that are selected from the general population and is considered a representative of the real population for that specific study.įor example, if we want to predict how the population in a specific age group will react to a new product, we can first test it on a sample size that is representative of the targeted population. The sample size is a term used in market research for defining the number of subjects included in a sample size.