The concepts of power, sample size, and generalizability play essential roles in the design, conduct, and interpretation of research studies across various disciplines, including healthcare, social sciences, and natural sciences. Sample size refers to the number of participants or observations included in a study. It has a direct impact on the precision and reliability of research findings. Larger sample sizes generally provide more accurate estimates of population parameters and increase the likelihood of detecting small, meaningful effects How does sample size influence the choice between parametric and nonparametric tests