I have measured an antibody levels in two groups of animals after immunization.
Group 1 (n = 30) which was immunized and Group 2 (n =15) which was untreated used as control. To find the statistical significance between two groups, I think I have to do unpaired "t" test. Is it correct? If so, please let me know how to do it SPSS package 11.5? Otherwise, give me some suggestions on what kind of test I need to perform.
Thanks in advance,