Mathematics, 23.08.2021 20:00 shahrukhafridi2668
Aaron has designed a trial to test a new energy drink. Fifty individuals in the treatment group try the new energy drink every day for two weeks, and they describe a moderate increase in their energy levels. Fifty individuals in the control group drink sugar water every day for two weeks, and they describe a significant increase in their energy levels. What has Aaron observed?
1) A sampling error
2) The margin of error
3) A confounding variable
4) The placebo effect
Answers: 1
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