En que consiste la caarrera de higiene y seguridad

The president’s role in a political party is to set the legislative agenda true or false

The process of rocks breaking down and becoming other rocks

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