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The estimation of the sample size (ie, the number of study participants in the clinical trial) is an important step in the development of the study protocol. The sample must be adequate in size (not too large or too small) and representative of the population. Determining the appropriate sample size is critical for achieving statistical power and ensuring the reliability of the study findings. Collaborating with an experienced statistician is essential for navigating the complexities involved in sample size calculations. Emtex Statisticians facilitate in-depth discussions and perform a series of calculations, considering factors such as study design and assumed treatment effect. In this way, they ensure that sample size estimates are robust and aligned with study objectives, minimizing the risk of inconclusive results.