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Author Question: Jerrika wants to study the impact of caffeine consumption on performance in a classroom. She takes ... (Read 86 times)

APUS57

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Jerrika wants to study the impact of caffeine consumption on performance in a classroom. She takes two classes (one meets at 9 a.m. and the other meets at 3 p.m.) and provides caffeine to the 9 a.m. class. She then compares scores on identical exams between the two classes. She finds that caffeine dramatically affects performance by improving scores. What might be a concern about the conclusions she draws about her data?
◦ Assignment to the experimental versus control groups was not random.
◦ There may have been a placebo effect.
◦ The conclusions would be stronger if she had varied the exams between the two classes as well.
◦ Jerrika cannot compare scores on identical exams.


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Marked as best answer by APUS57 on Nov 1, 2021

DylanD1323

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APUS57

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Reply 2 on: Nov 1, 2021
Thanks for the timely response, appreciate it


TheNamesImani

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Reply 3 on: Yesterday
Gracias!

 

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