Sample size estimation for savanna monitoring protocol development

First posted June 6, 2022 For additional information, contact: Director, Northern Prairie Wildlife Research Center U.S. Geological Survey8711 37th Street Southeast Jamestown, ND 58401Contact Pubs Warehouse When designing data collection protocols for a new research project, it is important to have large enough sample size detect desired effect, but not so be wasting time collecting more than needed. Power analysis methods can used estimate this size. In report, power analyses sizes needed savanna monitoring study, which the Fish and Service are developing protocols, described. were run specified difference (that is, effect size) between means from two areas or yearly area. Sample estimated nine different vegetation metrics that will measured in areas. Analyses each metric using range of variances, sizes, correlation among repeated measures. estimates varied metrics. Within metric, with means, size, correlation. Many too feasible when sampling; therefore, tables may first as guide determine an adequate differences some Then, detectable given mean, variance,