Mathematics, 02.12.2019 08:31 briannmalcolmp3l4pz
Aschool has 300 eighth-grade students and 200 ninth-grade students. the secretary randomly selects 12 eighth-grade students and 8 ninth-grade students to obtain a sample of size 20. what kind of sampling is this?
simple random sampling
stratified random sampling
systematic sampling
convenience sampling
Answers: 2
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Aschool has 300 eighth-grade students and 200 ninth-grade students. the secretary randomly selects 1...
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