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After randomizing the 200 students the difference in the results was 0.4. After comparing the results, they are not statistically significant. As a 6.7 difference could be achieved by random chance.

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Our results were published in a school newspaper. Students realized how studying affects their overall GPA, their lives were changed as they improved their grades and got into great schools.

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At the end of the semester the average GPA for studying was 3.62 while the average for the control group was a 3.0. The results show that studying for an hour had a positive impact on students GPA by raising the average 0.4%.

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With a sample size of 200, we will have a marginal error of 7.1%. This margin of error is low which is good because the results should be a good representation of the population.

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We could have half study or not study one semester, then switch then switch the next semester so they've receive each treatment. This will help us compare results when we are done.

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There is no blind or double blind study possible because the students needs to know if they have to study or not for the experiment to work.

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We had the school give us a list of 50 random students from each grade level then numbered them and used a random number table to select 25 students from each grade level as the treatment group. Potential lurking variables are time to study, and how/what they study.

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The 25 kids who do not study at all I need each group is the control group. There is no placebo in this study.

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We will repeat this experiment with a different 200 students from a different high school and compare the results.

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Our experimental units were found at the local high school where we received 50 students from each grade level to be part of the experiment.

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Change in GPA

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Amount of study time

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Half of the randomly assigned students will study for 1 hour every night. The other half will not study at all.

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50 children from each grade level (freshman, sophomore, junior, senior), GPA will be watched over one school semester

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Is studying for 1 hour a night effective towards a students GPA?