what is nar in demographics what is na in statistics what is no response in r if a variable is na will r use it in a model why is na variable a categorical variable? how to do not response on categorical variable which variables are binary dependent? what is the difference between no and no response in categorical variables? what is na in r what is no response which categorical variable is na what is na in categorical variables what's na in a r test r na definition what is na mean in r what does na mean in categorical variable what is na in variables what is the na in categorical variable when does r use blank fields can you use blank fields in r to indicate no response