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Armand chooses 4 of the 10 busses in front of his school, and polls 10 students from each to see if they think buses are

Armand chooses 4 of the 10 busses in front of his school, and polls 10 students from each to see if they think buses are comfortable. What is the sampling method? Question 13 options: Stratified sample Systematic sample Simple random sample Clustered sample Sample of convenience

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