I would like to know whether
Blood Pressure is significant in contributing to a
diseaseHypo. I have data from three different continents(let's say A,B,C) and each with groups
not_diseased. I have attempted to do t-test in R
t.test() and wondering whether I would need to assume that there is a equal variance or not between
diseased(diseased_A + diseased_B + diseased_C) and
not_diseased(not_diseased_A + not_diseased_B + not_diseased_C) of combined population.
Any views in this scenario please ?