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Project title How do sample sizes determine accuracy? Featured science projectScience project video
Difficulty Level Elementary school
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This science fair project was conducted to ascertain if increasing the sample size of participants in a survey can produce more accurate results. The science fair project was done by determining the number of left-handed persons among 100 participants, 200 participants, 300 participants, 400 participants and 500 participants.  

Instructions preview
1. For this science fair project, the independent variable is the number of students surveyed i.e.100, 200, 300, 400 and 500 students. The dependent variable is whether the students are right-handed or left-handed. This is verified by performing a simple test of dropping a pencil and observing which hand each student uses to catch it. The constants (control variables) are the age of the students and the number of students tested from each school. 2. Permission is sought from the administration of 5 schools to perform a random test on 100 students who 15 years of age. You will .....
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