most of the time, researchers included demographic questions in their research. but, I don't understand why they included in a survey. can anyone tell me the propose of this demographic information?
Robert Trevethan notes that "demographic variables are often used as part of the analyses - usually as possible influential independent variables." In this case, they are often known as "control variables" or "background variables," so that you remove their influence (i.e., control for them) before assessing the effects of your substantive independent variables.
Demisew Ferede, a major reason for obtaining that kind of information is simply to be able to describe the kind of people who participated in the particular research. Imagine not knowing whether they were all males, perhaps, or all females. Or not having any idea about their ages, including the spread of ages in a sample. Or not knowing whether two groups being compared were sufficiently similar or not in their backgrounds. And so on.
But, apart from that, demographic variables are often used as part of the analyses - usually as possible influential independent variables.
Collection and analysis of such data provides information on shifts and patterns of migration and movement. This would help municipal planners in terms of resource allocation including social services, business, public health, education, etc.
Robert Trevethan notes that "demographic variables are often used as part of the analyses - usually as possible influential independent variables." In this case, they are often known as "control variables" or "background variables," so that you remove their influence (i.e., control for them) before assessing the effects of your substantive independent variables.
Demographic information is very important and helps provide data regarding research participants for the determination of whether the participants in a research study are a representative sample of the target population for generalization purposes. The more the sample is representative the more the results are generalizable and the stronger external validity is for a particular study.
That information can be very useful for the research, as already explained.
In addition, the same information can be useful for planning other researches and could be used in a stratified sampling approach (if appropriate)
Also to determine differences between sociodemographic categories
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