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Author Question: Jerrika wants to study the impact of caffeine consumption on performance in a classroom. She takes ... (Read 84 times)

APUS57

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on: Nov 1, 2021
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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Reply #1 on: Nov 1, 2021
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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APUS57

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Reply 2 on: Nov 1, 2021
Excellent

juliaf

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Reply 3 on: Yesterday
Wow, this really help

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