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We randomized 240 students and the results and randomized difference in the results was 3%. The results are statistically significant because a difference of 22% could not be achieved by random chance.

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Does the temperature of the room affect test scores?

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The 60 students per grade level are randomly split into 3 groups of 20. Group A is assigned to take the test in a cold room. Group B is assigned to take the test in an average temperature room. Group C is assigned to take the test in a warm room.

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The explanatory variable is the temperature of the room, whether it’s cold, average, or warm.

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At the end of the testing period, every group’s test scores are averaged.

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We found 240 students in grades 9-12. There were 60 in each grade level. All were given a math test that was based on their math level.

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Our results were published in an education publication. Many teachers and school board directors read the article. A few months after the study is published, the school board passes a policy that requires all classrooms to be at a room temperature of 75 degrees, especially during testing sessions.

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At the local highschool, we randomly selected students from each grade level and asked them if they wanted to participate. We continued random selected until were reached 60 students from each grade level.

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We would go to another school and do the same selection process to gather another 240 students to test in the different room temperatures. From this, we can confirm that the normal/average classroom temperature is best for a higher test score average.

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The sample size was 240, with a margin error of error of 6.6%. This margin of error is good because it shows that our data collected is a good representation of the population.

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We could make groups of three based on similar gender, age, and GPA and then randomly assigned them to one of the three rooms. In doing this, we can test how different room temperatures during testing can affect the test scores using similar students.

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We were not able to blind our subjects because they would know whether the  temperature was cold, normal, or warm during their testing period.

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We matched up students in each grade level by GPA, age, and gender. They were matched up in trios (to account for 3 different varibles) and each was randomly assigned room temperature.

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We randomly selected the students based on their student ID. Possible lurking variables are GPA and gender.

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The control groups is each Group B per grade level, which is the group assigned to the average room temperature.