Abstract
How does an investigator know that he has enough subjects in his study design to have the predicted outcomes appear statistically significant? In this Investigators' Corner I discuss why such planning is necessary, give an intuitive introduction to the calculations needed to determine required sample sizes, and hint at some of the more technical difficulties inherent in this aspect of study planning.
| Original language | English |
|---|---|
| Pages (from-to) | 519-520 |
| Number of pages | 2 |
| Journal | Journal of Foot and Ankle Surgery |
| Volume | 53 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2014 |
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Keywords
- Hypothesis testing
- Power analysis
- Sample size
- Statistical significance
- Type II error
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Surgery
- Medicine(all)
Cite this
Counting your chickens before they're hatched : Power analysis. / Jupiter, Daniel.
In: Journal of Foot and Ankle Surgery, Vol. 53, No. 4, 2014, p. 519-520.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Counting your chickens before they're hatched
T2 - Power analysis
AU - Jupiter, Daniel
PY - 2014
Y1 - 2014
N2 - How does an investigator know that he has enough subjects in his study design to have the predicted outcomes appear statistically significant? In this Investigators' Corner I discuss why such planning is necessary, give an intuitive introduction to the calculations needed to determine required sample sizes, and hint at some of the more technical difficulties inherent in this aspect of study planning.
AB - How does an investigator know that he has enough subjects in his study design to have the predicted outcomes appear statistically significant? In this Investigators' Corner I discuss why such planning is necessary, give an intuitive introduction to the calculations needed to determine required sample sizes, and hint at some of the more technical difficulties inherent in this aspect of study planning.
KW - Hypothesis testing
KW - Power analysis
KW - Sample size
KW - Statistical significance
KW - Type II error
UR - http://www.scopus.com/inward/record.url?scp=84902820629&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84902820629&partnerID=8YFLogxK
U2 - 10.1053/j.jfas.2014.05.001
DO - 10.1053/j.jfas.2014.05.001
M3 - Article
VL - 53
SP - 519
EP - 520
JO - Journal of Foot and Ankle Surgery
JF - Journal of Foot and Ankle Surgery
SN - 1067-2516
IS - 4
ER -