This is a test version of Biostars. For the public version, visit https://www.biostars.org.
How Can I Vary The Number Of Replicates In A Power Analysis

Hi,

I am new to using statistics and I am trying to do a power analysis to determine the sample size I might need in my research. All the packages I see use the effect size, significance and power to determine the sample size. Some packages let me enter the Standard deviation I have from my test data. I would also like to see the effect of varying the number of replicates on the effect size. Does anyone know what package I should be using to do this?

Thanks very much for your help in advance!

analysis
• 4,727 views • link
written by pummy • pummy

2 answers

I've found this straightforward to do using basic methods in R. You can read more for example here.

Also, I like the discussion of power analysis for sample size in Michael Crawley's Statistics: An introduction using R.

• 198 views • link
written by Alex Paciorkowski Alex Paciorkowski

Thanks so much Alex!

• 0 views • link
written by pummy • pummy

G*Power is one of the nicer programs I've seen for such things. You can vary your sample sizes (i.e. replicates) or whatever else you want. There are mildly useful tutorials for many of the use cases on their website.

• 0 views • link
written by Devon Ryan Devon Ryan

Thanks dpryan. I have started using GPower for my analysis.

• 0 views • link
written by pummy • pummy

Log in to answer this question.

More posts like this