Hi!
I've calculated a reference interval for some bloodwork values, and want to compare my calculated range with that of a historic control from a different group of animals. My group consisted of 26 animals, while the reference material's consisted of 51.
From the historic group, I have the mean/SD/range (assuming that means it's normally distributed but the paper also mentions using nonparametric methods..). I don't have access to their raw data. From what I do have, I can tell that their range falls completely within mine. What should I use to prove that they are/are not different? I've seen that I could calculate 90% CI around the upper/lower bounds (clinical pathology recommends 90 vs 95 for small sample sizes) but that if those overlap do I still have to do a follow-up test to confirm?
TY!