Self-esteem and sports
The hypothesis that participants who are active in sports have a higher self esteem is proven to be true.
Getting involved in sports is a very good way of building character and confidence in young children. This will help them to improve their self- esteem and become more confident.
The experiment can also be performed to examine whether students who achieve high results for their academic subjects, have a greater self esteem than average students.
You might also wish to investigate whether age matters - ie: do your results differ for older children/teenagers? How about adults?
Perhaps the number of participants should be increased for better results.
Building self-esteem through sports - http://healthpromotiontips.com/building-self-esteem-through-sports/
How sports effect self esteem and family life? - http://sitemaker.umich.edu/dolan.356/sports_and_self-esteem