In which of the following situations would stratified sampling be recommended? A. The population has more males than females, and the researcher is studying a topic related to gender and wants equal representation of males and females B. There are four distinct ethnic groups in New Orleans, and the researcher wants to be assured each group is represented according to their true distribution in New Orleans C. A superintendent wants to be sure she selects teachers from elementary, middle/junior high, and high schools in numbers that are equal to the proportions of teachers in these types of school in her district. D. All of these.
