TY - JOUR T1 - Correction: Understanding statistical terms: 1 JF - Drug and Therapeutics Bulletin JO - Drug Ther Bull SP - 36 LP - 36 VL - 47 IS - 3 A2 - , Y1 - 2009/03/01 UR - http://dtb.bmj.com/content/47/3/36.abstract N2 - Our article Understanding statistical terms: 1 (DTB 2009: 47: 22–24) stated that the standard deviation of a population is calculated … ER -