system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Power of a study can be increased by-
assistant
The correct answer is  <p> Decreasing ss error. Reference:Simple Biostatistics by Indrayan & Indrayan,1stbedition,page no: <\p>