Limits of retrospective power analysis
Journal of Wildlife Management
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Abstract
Power analysis after study completion has been suggested to interpret study results. We present 3 methods of estimating power and discuss their limitations. We use simulation studies to show that estimated power can be biased, extremely variable, and severely bounded. We endorse the practice of computing power to detect a biologically meaningful difference as a tool for study planning but suggest that calculation of confidence intervals on the parameter of interest is the appropriate way to gauge the strength and biological meaning of study results.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Limits of retrospective power analysis |
| Series title | Journal of Wildlife Management |
| DOI | 10.2307/3802357 |
| Volume | 62 |
| Issue | 2 |
| Year Published | 1998 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Leetown Science Center |
| Description | 7 p. |
| First page | 801 |
| Last page | 807 |