#------------------------------# ## Variance and Power ## #------------------------------# power twomeans 0, diff(0.2) // for multiple values of forvalues i = 0.1 (0.1) 1.0 { power twomeans 0, diff(`i') } // using raw effect sizes and standard deviations power twomeans 0 0.5, sd1(.5) sd2(.7) // adjusting alpha or power power twomeans 0, diff(0.2) alpha(0.10) power(0.7)