why is variable c not a co-variable what is the idea of not manipulating the dependent variable which variable is not a covariable in a study? is c a covariable? what is the difference between an independent variable and co-dependent variable in a study? are independent and dependent variables the same what is the idea of not manipulating variable c which variable has no dependent effect which is the idea of not manipulating variable d? what is the idea of not manipulating variable c when a variable is not a co variable, what is the idea that it cannot interfere with all other variables. is a variable not a co-variable? which variable is not a variable in a co-variable study why not manipulating variable c why not manipulating variables what is the concept of not manipulating variable c? why is variables a and b not a covariable which variable is not a co-variable in a study? if a variable is a covariable which one is not regarded as a dependent variable? which variable is not a co variable