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20-12-2022
Mathematics

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does caffeine improve exam performance? suppose half of the students in the 8:30 section of a course are randomly allocated to the treatment group (two cups of coffee), the other half to the control group (two cups of decaf). in addition, half of the students in the 9:30 section of the course are randomly allocated to the treatment group, the other half to the control group. this is an example of a

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