So, I am working with a professor on some astronomy research. I need two compare two samples but one of them has a much smaller size due to the lack of observations. The samples have about 5 parameters. I don't know much about statistics but from reading so far I think the Kolmogorov–Smirnov test would be the most appropriate. Is that correct or is there any other tests I might want to look into? I need to see if the two samples are the same despite the fact that one is drawn from a smaller data set. thanks!