To obtain valuable data you have to pay attention to survey planning, question creation and identification of your target group and the characteristics of its members. Will you ask each and every member of your target group and carry-out comprehensive research? Or are you planning just to ask just a few peers or friends?
Comprehensive research: This kind of research is very time consuming and potentially expensive. You ask all members of your target group. The more members your target group has the more the survey will cost.
Incomprehensive research: You only ask a few members of your target group. The data will apply to this select group only. If you need a wide range of accurate data from the target group you have to choose the right respondents and then use statistical methods such as estimation or hypotheses to establish a result.