How to calculate sample size and why.

How to calculate sample size and why. Clin Orthop Surg. 2013 Sep;5(3):235-42 Authors: Kim J, Seo BS Abstract WHY: Calculating the sample size is essential to reduce the cost of a study and to prove the hypothesis effectively. HOW: Referring to pilot studies and previous research studies, we can choose a proper hypothesis and simplify the studies by using a website or Microsoft Excel sheet that contains formulas for calculating sample size in the beginning stage of the study. MORE: There are numerous formulas for calculating the sample size for complicated statistics and studies, but most studies can use basic calculating methods for sample size calculation. PMID: 24009911 [PubMed - indexed for MEDLINE]
Source: Clinics in Orthopedic Surgery - Category: Orthopaedics Tags: Clin Orthop Surg Source Type: research