# 7.9: Chapter References


## 7.1 The Central Limit Theorem for Sample Means

Baran, Daya. “20 Percent of Americans Have Never Used Email.”WebGuild, 2010. Available online at http://www.webguild.org/20080519/20-...ver-used-email (accessed May 17, 2013).

Data from The Flurry Blog, 2013. Available online at blog.flurry.com (accessed May 17, 2013).

Data from the United States Department of Agriculture.

7.9: Chapter References is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by OpenStax via source content that was edited to conform to the style and standards of the LibreTexts platform; a detailed edit history is available upon request.