שיא הכי רחוק לבבי sample size calculations in clinical research החזר כספי אף אחד הר
Sample Size Calculations in Clinical Research, Second Edition by Shein‐Chung Chow, Jun Shao, Hansheng Wang - O'Brien - 2008 - International Statistical Review - Wiley Online Library
How to calculate sample size for randomized control trial (RCT)? | ResearchGate