why do you assign baseline variables in random experiments why use control variable? why use random assignment as a baseline variable why would one want to control for any number of baseline covariates in a situation where random assignment to treatment group is strictly exogenous? are baseline treatments exogenous why use an exogenous random assignment how to choose random treatment in science why are baseline variables exogenous when to use control variables which is an exogenous variable when randomly assigned to treatment group? what variables are controlled in a random assignment why would one want to control for any number of baseline variables in a situation where the assignment to treatment group is random? what is the use of baseline control variable why do researchers use control variables in random assignment experiments when is the random assignment for treatment exogenous? why would one want to control for any number of baseline baseline covariates in a situation where the assignment to treatment group is random? should a randomly assigned control group be strictly exogenous? why would one want to control for any number of baseline variables in a situation where the assignment to treatment group is random? when randomly assigned to treatment group which variable should be strictly exogenous when to use random assignment