Scientific Questionnaire Miniposter

Question

Does the average number of hours slept differ from summer to the school year?

Hypothesis

On average, the number of hours slept in the summer will be more than the number of hours slept in the last school year.

Type of Investigation

A Comparative Investigation

Parts of the Experiment

• Independent variable: The time of year
• Dependent variable: The average number of hours slept
• Test subjects: 10th - 12th graders at Coppell High School, Coppell, Texas

Data Table

The average number of hours slept in the summer as opposed to the average number of hours slept last school year

Mean: 8.96, 5.92

Range: 6, 6

Standard Error of Measurement: 0.318747549, 0.288212884

Bar Graphs

Range Error Bars
Two SEM Error Bars

Analysis

The average number of hours slept in the school year is less than the average number of hours slept in the summer. When calculated using a t-test, many of the values do not overlap. This means that the averages are greatly different and that even with a wide span, in this case, the highest values match about half of the lower averages in summer. Even with the possible outliers, it is evident that there must have been a few differences that would cause the disparity. One possible reason is that more assignments, projects, and work have caused teens to prefer work over sleep. Other include higher use of technology, caffeine, and over scheduling; all major problems of the 21st century[A]. In turn, this caused pressure a sort of negligent attitude towards sleep. Even though many teens try to replenish their sleep by taking naps and by spending a lot of time sleeping on the weekends, according to Dr. Lawrence J. Epstein of the Harvard-affiliated Sleep Health Centers, sleep must be replayed in a long term format that lasts several days[B]. Students at Coppell High School must work harder to provide the principle of Homeostasis by making 7-8 hours of sleep a regular part of their daily lives[C].

Conclusion

On average the number of hours slept in the summer was significantly higher than the number of hours slept in the school year. A higher number of activities in the school year versus the summer probably led the shortages of time.

Sources of Inaccuracies/Errors

• False information given by the subject due to a misunderstanding
• False information given by the subject intentionally
• False information given by the subject due to him/her not knowing the exact answer
• Technological errors in the collection of the data
• Etc.

Bibliography

• "Free College Pathology Student Sleeping Creative Commons." Flickr. Yahoo! Web. 7 Sept. 2015.
• [A] "U.S. Teens Getting Less Sleep Than Ever." Consumer HealthDay. Web. 7 Sept. 2015.
• [B] "Repaying Your Sleep Debt - Harvard Health." Harvard Health. Web. 7 Sept. 2015.
• [C] "How Much Sleep Do We Really Need?" How Much Sleep Do We Really Need? Web. 7 Sept. 2015.
• "Thomas Dekker Quotation." Flickr. Yahoo! Web. 7 Sept. 2015.