how do you calculate estrogen levels? what is the difference between estrogen and hormone a how does a synthetic hormone b differ from other agents of stress? what is the difference between a controlled trial of medication and an independent study what is mean of hormone_b which factor is a dependent variable when taking a hormone drug_a what is the difference between a synthetic and a controlled substance? how would you determine if drug_a increases hormone_b what is the difference from hormone_b to hormone_a how to determine hormone levels does drug_a affect hormone_b when does drug_a decrease hormone_b does hormone affect hormone_a which factor drives the difference between drugs which factor drives the difference between drug_a and hormone_b? which factor reduces hormone_a by reducing hormone_b by increasing estrogen what is the difference between b and a b what factor is a positive for hormone what is the difference between hormones what variables are involved in linear regression