You lost me at "Blood donation". It's common sence that this is used by new couples to check if they have STDs, without the unconfort of going to a clinic.
Relating to the 2nd study, 100$ or 1$ is the same (not significant) for someone with high income so they just found a correlation between "rich" people and higher number of sexual partners.
Relating to the 2nd study, 100$ or 1$ is the same (not significant) for someone with high income so they just found a correlation between "rich" people and higher number of sexual partners.
Do you concur?