Mathematics, 12.02.2020 03:08, katnsanford

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?

a. Systematic sampling
b. Convenience sampling
c. Stratified sampling
d. Cluster sampling

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