Question

Peter is conducting an experiment to determine whether a new medication is effective in reducing swelling. He gets 1,500 volunteers with swelling and divides them into two groups. The control group does not receive any medication; the treatment group receives the medication. The patients in the treatment group show reduced signs of swelling. What can Peter conclude from this experiment?

Answer 1

Peter can conclude that the medication is effective when given to a group of people who presented swelling.

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Answer 2

That the medication made the treatment group have signs of reduced swelling.