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How does drinking caffeine prior to a test influence a person’s test scores?

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90 students for the senior class will be in this experiment.

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Teachers from select classes will use a random number generator that will select the students that will be apart of th study.

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The different treatments will be the caffeine vs water pill the students will take prior to the test.

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The explanatory variable would be the type of pill the student receives.

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The response variable would be the student’s grade on the test.

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Possible lurking variables could be caffeine tolerances vary from person to person and overall intelligence is different for everyone.

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The water pill will act as the placebo in the experiment. None of the subjects will be able to tell which pill is which.

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Blind: both pills will look identical on the outside so the subjects are unaware of what pill they will be consuming
Double-Blind: a teacher from outside the experiment will give the students the pills

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Group A will take the water pill and Group B will take the caffeine pill. The following week, the groups will take the opposite pill that they had in the previous week (Group A will now have the caffeine pill and Group B will now have the water pill)

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My sample size for my experiment is 90 students. My margin of error is 10.5%. This means that the predicted population percentage is 10.5% and this is a good margin of error to have because the smaller the margin of error the more confident we can be in the results.

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I would replicate my study by taking a new set of 90 seniors from different classes than the previous 90 students. By adding more students to my data, it will make my results stronger and my margin of error decrease.

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The data tat was gathered at the end of the study was that the students who have taken the caffeine pill prior to their tests got higher scores and also finished the test much faster than the ones who had taken the water/placebo pill.

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The results were statistically significant considering the huge difference between the test scores/test taking speed between the caffeine pill takers and the water pill takers.

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The water pills cost about 50 cents per pill which is $45 total for 90 water pills and the caffeine pill is about $2 a pill which is $180 for 90 pills. Each student participating will receive $100 and the salary of each worker in the experiment is $15 an hour.

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Once the news and statistics hit the internet about caffeine pills causing students be to get higher grades and the ability to be a faster test taker, all the students across the nation raced to the stores to purchase these caffeine pills. We made so much profit from our study and changed the way students face their tests.