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Mathematics, 23.11.2020 08:40 mooncake9090

Dashboard Another vaccine company gave a flu shot to 100 people and a placebo (fake) shot
to another 100 people. Everyone in both groups were tested to see if they came
down with the flu.
Would this be considered a Observational Study or a Controlled experiment?
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Answers: 3

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Dashboard Another vaccine company gave a flu shot to 100 people and a placebo (fake) shot
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