Scientific Questionnaire Poster

By: Hrishikesh Inamdar and Darrin Desylva


Does gender affect the amount of hours a person sleeps?


Yes, gender will affect the amount of sleep. Females will sleep less on average on a weekday than males.

Type of Investigation

This experiment was a comparative investigation

Parts of the Experiment

Independent variable - Gender

Dependent variable - amount of hours that a person sleep

Experimental Group - the people we asked

Factors held constant - age range...questionnaire


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The Data that we collected showed that there was no significant difference in the average sleep time (in hours) between the two genders. The average for the males and females were 6.75 and 6.44 respectively. Although these are statistically significantly far apart, if we include errors in calculation by calculating the + and - 2SEM (Standard Error of Mean - calculated by the excel spreadsheet software) for both genders, we see a major overlapping region (as shown in the second graph). By subtracting and adding 2 * SEM from the average ensures that the true mean (the average amount of sleep each gender gets each night) will 95% of the time be in that range. Usually, it has been shown that females generally get less sleep than males [1]. Not only this, but females also have shown more sleep problems and wake up in the middle of the night more often. This may be because of evolutionary traits or simply because of the separate hormones present in both types of bodies. Although the reasons for the female's dearth of sleep are unclear, the true data shows that gender does indeed affect sleep.


The hypothesis that gender will affect sleep and females will sleep less than men was disproved by our collected data.

Sources of Error

Due to time and resource constraints, it was difficult to get accurate data for our experiment. Inaccuracy may be caused by the fact that most of our data was collected from students in our AP Biology class. Because they take AP Biology, it can be inferred that they take other AP classes as well. Due to the intensity of such classes, the number of AP classes can determine how long a person sleeps. It would be more accurate if we took a sample of people in many different classes. On a broader scale, we also should have obtained data from people outside of our school. This would have allowed us to get much more varied results and also would have allowed us to see the effects of the high school on students' sleep.

Secondly, because our time was restricted, we were only able to receive 30 different pieces of data from 30 different people. 30 is a large number, but it would be much more statistically accurate if we took data from much more people. our school has nearly 2000 students. If we took about 200 (or 10% of all) students for our sample, we would have received data that reflected the student population of the school much better (rather than simply taking data from one class like AP Biology)


1. "Gender Differences in Sleep Patterns." - OECD, n.d. Web. 05 Sept. 2015.

2. "Does Your Gender Affect Your Sleep Patterns?" The Joint the Chiropractic Place Raleigh NC. The Joint, 09 Feb. 2014. Web. 05 Sept. 2015.