wtpx is the standard error wtpx is a variable in which why is wtpx not an independent variable standard error of binomial variable how to find the standard error of binomial variable what is wtpx what is the standard error of binomial variable and how is it derived what is the standard error of binomial variables derived from continuous variables how to make binomial variability why use binomial variable wtpx vs standard error how to calculate standard error of continuous variables what is the standard error of variable wtpx? what does standard error mean for wtpx a binomial variable that measures willingness to pay is can the demand curve be considered a binomial variable what would be the standard error of binomial variable derived from constants which variable is binary? when is wtpx considered binary what is standard error mean binomial variable