d3 참고사이트 : http://informationandvisualization.de/blog/box-plot
이상점 참고 자료 : http://blog.naver.com/PostView.nhn?blogId=running_p&logNo=90178707051
참고 PPT : https://www.google.co.kr/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CD4QFjAC&url=http%3A%2F%2Fie1.kaist.ac.kr%2F~stat%2Fstat2%2Fch11.ppt&ei=D4rgUo6hM66kiAfts4DIBg&usg=AFQjCNHnallHxstRRARWbZ0LKN24pFd0Uw&sig2=W7BAg4LmR-USLBoLGgjR7A&bvm=bv.59568121,d.aGc&cad=rjt
boxplot 위키피디아 참고자료 : http://en.wikipedia.org/wiki/File:Boxplot_vs_PDF.svg