Short description of what the significance level is and what it takes for a result to be statistically significant.
A cartoon suitable for use in discussing the interpretation of p-values of different levels. The cartoon is number 1478 (January, 2015) from the webcomic series at xkcd.com created by Randall Munroe. Free to use in the classroom and on course web sites under a creative commons attribution-non-commercial 2.5 license.