Factors Determining Sample Size. Hence the usual point of view is that the sample size is the determined function of variability statistical method power and difference sought. Samples can be vague or specific.
Many researchers agree that sample size has a two-fold role in research. Since no sample will be perfect you need to decide how much error to allow. For example you may want to know what people within the 18-25 age range think of your product.
The formula does not cover finite population.
Three factors are used in the sample size calculation and thus determine the sample size for simple random samples. Sample size is a market research term used for defining the number of individuals included to conduct research. 1 the margin of error 2 the confidence level and 3 the proportion or percentage of the sample that will chose a given answer to a survey question. Samples can be vague or specific.
