How to Calculate Sample Size and Why.
10.4055/cios.2013.5.3.235
- Author:
Jeehyoung KIM
1
;
Bong Soo SEO
Author Information
1. Department of Orthopedic Surgery, Seoul Sacred Heart General Hospital, Seoul, Korea. kjhnav@naver.com
- Publication Type:Review
- Keywords:
Sample size
- MeSH:
Chi-Square Distribution;
*Research Design;
*Sample Size;
Statistics as Topic/*methods
- From:Clinics in Orthopedic Surgery
2013;5(3):235-242
- CountryRepublic of Korea
- Language:English
-
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.
