i want to know the role of variables of the qualitative design
yes
An independent variable does not change. It is independent of everything else In research, there needs to be a dependant variable.
Yes it depends on what you are measuring in your study. some examples of variable include age, sex, marital status among others
There math tools used in a experiment (Ex: Like in a hypothesis) If u use them u will be able to measure your results and have accurate data.
Independent variables answer the question "What do I change?" Dependent variables answer the question "What do I observe?" Controlled variables answer the question "What do I keep the same?"