Heimildir
6.1 Stöðluð normaldreifing
CollegeBoard. (2012). 2012 College-bound seniors: Total group profile report. Sótt af http://media.collegeboard.com/digitalServices/pdf/research/TotalGroup-2012.pdf
Joyce, C. A., Janssen, S., & Liu, M. L. (2010). The world almanac and book of facts, 2010. New York, NY: World Almanac Books.
London School of Hygiene and Tropical Medicine. (2009). Calculation of z-scores. Sótt af http://conflict.lshtm.ac.uk/page_125.htm
National Center for Education Statistics. (2009). ACT score averages and standard deviations, by sex and race/ethnicity, and percentage of ACT test takers, by selected composite score ranges and planned fields of study: Selected years, 1995 through 2009. Sótt af http://nces.ed.gov/programs/digest/d09/tables/dt09_147.asp
NBA.com. (2013). NBA Media Ventures. Sótt af http://www.nba.com
StatCrunch. (2010). Blood pressure of males and females. Sótt af http://www.statcrunch.com/5.0/viewreport.php?reportid=11960
The Mercury News. (án dags.). Sótt af http://www.mercurynews.com/
Wikipedia. (2013). List of stadiums by capacity - Wikipedia. Sótt af https://en.wikipedia.org/wiki/List_of_stadiums_by_capacity
6.2 Notkun normaldreifingar
Chicago Public Media & Ira Glass. (2013). 403: NUMMI. Sótt af http://www.thisamericanlife.org/radioarchives/episode/403/nummi
lauramitchell347. (2012, 28. des.). Smart phone users, by the numbers. Visually. Sótt af http://visual.ly/smart-phone-users-numbers
Statistics Brain Research Institute. (2013). Facebook company statistics – statistic brain. Sótt af http://www.statisticbrain.com/facebook-statistics/
Wikipedia (2013). Naegele's rule. Sótt af http://en.wikipedia.org/wiki/Naegele's_rule
Win at the Lottery. (2013). Scratch-off lottery ticket playing tips. Sótt af www.winatthelottery.com/public/department40.cfm