are variable populated are variables populated at a low level how many variables can be combined what if you combine a variable that is very lightly populated why combine variables that are extremely lightly populated? what is the difference between mixed and heavily populated data when to combine two variables why combine two variables together why combine variables that are heavily populated why combine variables what is the populated data in statistics? can you combine several variables to form a mixed distribution? why is it important to combine variables that are very lightly populated can you combine variables that are very lightly populated when combine variables that are very lightly populated what is the difference between combining two variables and combining them together how to combine variables in a survey when combined what data is the most valuable which variables can be mixed can you combine variables that are extremely lightly populated