Research Article Statistics at square one. III--Standard deviation. Br Med J 1976; 1 doi: https://doi.org/10.1136/bmj.1.6022.1393 (Published 05 June 1976) Cite this as: Br Med J 1976;1:1393 Article Related content Metrics Responses Peer review This article has a correction. Please see:Correction - August 13, 1955 This is a PDF-only article. The first page of the PDF of this article appears below.