Do they necessary have to have quantitaitve values or can they sometimes be qualitative??

 

-Thanks

Variables can be qualitative. Colors are examples. When the quantitative independent variable "amount of chemical X" is put into a solution it turns dependent variable "what color." Someone more adept in chemistry could give you a more competent example along those lines, but I think you get the idea.

Do they necessary have to have quantitaitve values or can they sometimes be qualitative??

 

-Thanks

 

As CDarwin noted, the values can be qualitative. For instance, in determining gender the independent variable is the chromosome -- either X or Y. The dependent variables are male and female.