| Are you talking about a market research focus group? Market research firms (Synovate, TNS, AC Nielsen, etc.) conduct them all the time. You have to have the characteristics of the population that they are trying to sample for their client. Typically, they would invite suitable candidates to participate (for a modest reward) and not the other way around. If someone specifically wanted to be in a focus group, it could create a sampling error to allow a self-invited person into the group. |