Another problem facing us pollsters is that even though we want diversity in our sample, the data from some groups in the population may be easier to obtain than from other groups, and we may be tempt...Another problem facing us pollsters is that even though we want diversity in our sample, the data from some groups in the population may be easier to obtain than from other groups, and we may be tempted to favor ease over diversity. For example, when counting Christians worldwide, it is easier for us to get data from churches of people who speak some languages rather than others and who are in some countries rather than others and who are in modern cities rather than remote villages.