I am a master's student, and I need your help. I did experiment on one group of rats, the group was tested during 8 days, this is the first stage. The same group was also tested again but this time the test phase was 7 days. I tried to do my analysis using ANOVA repeated measures but I had a problem with the days. I want to know the difference in the 2 tests but the days are not the same number. I don't know how to handle it. If there is any way to do the analysis using repeated measures ANOVA.

I tried to use repeated measure anova within subject effect My first factor will be test>>> with 2 levels (1 & 2 test) second factor is day with the level of ?? Here is the problem! if I write 8 there will be extra day in test 2 and the analysis cant carry!!

  • $\begingroup$ Is that mean there is a away to carry the analysis? can you recommend me a source or something? $\endgroup$ – Monica Dec 7 '13 at 13:35
  • $\begingroup$ Search for "anova for unbalanced data" in google, you will find a lot of materiel there. mcsr.olemiss.edu/mathematica/Two-factorANOVAinSPSS.pdf $\endgroup$ – Youbaraj Sharma Dec 7 '13 at 13:39
  • $\begingroup$ You may also want to ask the same question in mathematica.stackexchange.com $\endgroup$ – Youbaraj Sharma Dec 7 '13 at 14:17

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