Is an online poll asking the preferred mobile phone type used by school children an observational study or experimental

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answerhappygod
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Is an online poll asking the preferred mobile phone type used by school children an observational study or experimental

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Is an online poll asking the preferred mobile phone type used byschool children an observational study or experimental study? If itis an experiment, what is the controlled factor?
1-The study is an experiment. The controlled factor is thestudents.
2- The study is an observational study.
3-The study is an experiment. The controlled factor is the typeof mobile phone.
4-The study is an experiment. The controlled factor is theonline poll.
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