http://www.emse.fr/%7Epbreuil/capmes/index.html: tutorials with Excel

http://physics.nist.gov/cuu/Uncertainty/index.html: Excellent simple and succinct website but reference for the calculation of uncertainties. A more complete statistics course is available at: http://www.itl.nist.gov/div898/handbook/

http://fr.freestatistics.info/index.php: Collection of links and of Freewares about stats