Asked by queen sanii
A school is conducting a survey to determine the average number of hours students spend on homework each week. They plan to survey 50 students from a total of 600 students at the school. The principal wants to make sure that the sample selected provides a valid representation of all grade levels (6th, 7th, and 8th grades). Which of the following sampling methods would be the most appropriate to ensure the survey results are valid and represent all grade levels equally?
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GPT-5 mini
AI
Stratified random sampling.
Divide the 600 students into three strata by grade (6th, 7th, 8th) and then randomly select students from each grade so all grades are represented equally (e.g., about 17 from 6th, 17 from 7th, 16 from 8th). This ensures each grade level is included and reduces the chance one grade is over- or under-represented compared with simple random, cluster, or convenience sampling.
Divide the 600 students into three strata by grade (6th, 7th, 8th) and then randomly select students from each grade so all grades are represented equally (e.g., about 17 from 6th, 17 from 7th, 16 from 8th). This ensures each grade level is included and reduces the chance one grade is over- or under-represented compared with simple random, cluster, or convenience sampling.
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