Another common sample technique is stratified random sampling. Using this strategy, the entire population of Baldwin High School students would be divided into separate strata, or subgroups (e.g., boys versus girls). Next, a random sampling of students would be taken from each subgroup using either simple random sampling or a random number generator. The benefit of stratified random sampling is that it allows you to compare the opinions of two different groups rather than the entire school, For example, are more boys in favor of block scheduling then girls?