how do I reduce a non negative variable by statistic what is non negative variable for factor analysis stata can you use a factor on stata what is a negative factor in stata can factor analysis get negative when do you test factors in stata? why do i find negative value in stata how to find if an explanatory variable is negative which variable should be negative how to reduce variables using stata what variable should be positive for factor analysis how to calculate a negative factor using stata why is there a negative variable for factors in stata when reducing a few variables to a single explanatory variable, the result of this factor analysis will be _____. what is the function of factor analysis how to get negative values in factor analysis stata can you use statistica to calculate the range of a variable? what is the negative range for an explanatory variable in statistica can you run an explanatory variable in stata what is a factor analysis used for and how do i get the correct value