I would like your opinion about which analyses to use for the research question.
I've got a repeated measures with binary data. N = 20
H0 = there is no difference between pre and post measurement
HA = there is a difference between pre and post measurement
So, I first wanted to go for the McNemar-test or maybe a Fisher's test because of the small sample size. But now I looked into it, I'm not sure if any of these is the right test. Because within the experiment it's really unlikely that someone scores 1 at T1.
These are my predictions (by rule of thumb)
T2 |0 |1 | T1|0 |15 |5 | |1 |0 |0 | prediction if H0 is correct T2 |0 |1 | T1|0 |2 |18 | |1 |0 |0 | prediction if HA is correct