Que son los censos y cual e ssu importacia

Which label identifies the step labeled w?

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling

Acharacterized by intimate, long-term, face-to-face association and cooperation. primary group community clique secondary group