Mathematics, 05.05.2020 04:37 sierraseideman1023

Is a survey of the guests about their preference of food at a party an observational study or experimental study? If it is an experiment, what is the controlled factor?

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The study is an experiment. The controlled factor is the party.

The study is an experiment. The controlled factor is the food.

The study is an experiment. The controlled factor is the survey.

The study is an observational study.

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