Posting: # 19504
I have one quesion why there is not selection for 3-ways crossover design in sample size estimate. If there are other soft could estimate sample size for 3-ways crossover design?
Edit: Category changed; see also this post #1. [Helmut]
Posting: # 19507
» […] why there is not selection for 3-ways crossover design in sample size estimate.
Simple: Yung-jin didn’t implement it.
» If there are other soft could estimate sample size for 3-ways crossover design?
I recommend package
In most functions power can be calculated by the shifted t-distribution (crude approximation), the noncentral t-distribution (like in
Example for a 3×3 design:
If you are not assuming a common variance for all pairwise comparions (very good idea: see there) estimate the sample size for the common 2×2×2 design instead:
If you are interested in Two-Stage Designs (group-sequential and adaptive TSDs with sample size re-estimation: parallel groups and 2×2×2 crossovers) consider package
The quality of responses received is directly proportional to the quality of the question asked. ☼
Posting: # 19508
Thank you so much, This is an powerful tool.
Edit: Full quote removed. Please delete everything from the text of the original poster which is not necessary in understanding your answer; see also this post #5! [Helmut]