Sample Size Considerations

"Balance and power concept between white and black, not isolated"

Sample size is one of the most important decisions you can make in your research study design. PRC generally recommends a minimum sample size of 50 patient interviews per patient group per quarter or 200 per year since a sample that is too small will result in data that, when factoring in the error rate, is limited or even useless at a practical level. A sample that is larger than necessary simply wastes precious resources.