I'm looking at activity data from squirrels and want to see if my study animals follow daily rhythms. The problem is that I have a relatively low sample size:
I have data from 13 squirrels for
- time emerging from drey (hh:mm)
- time going into drey (hh:mm)
- time active (as a result of the two above; in minutes)
with 4-16 observations (= 4-16 days, the animals emerged and went into the drey only 1 time per day) per individual (mean 8.7 +- 4.4) for all 3 variables - I thought of testing all 3 variables separately.
Does anyone know about a statistical test to investigate within individual variation with this low sample size? Or is the sample size to low for statistical testing anyways? I've tried to find a solution for this but I'm struggling.
If you know about a possibility to test this in R, please let me know which package would be helpful.