The president of the math club is conducting a survey to see where the twelfth-grade class wants to go on their field trip. Instead of asking the whole class, she surveys only the twelfth-grade members of the math club. She records their choices and plans to present the results to the school principal. What type of sampling did she use?

She surveyed the twelfth-grade students who were easiest for her to reach: the members of her math club. This is convenience sampling, because the participants are selected based on availability rather than randomly chosen from the entire twelfth-grade class. Stratified or simple random sampling would require a planned random selection from the class.

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