An article published in the June 10 2002 issue of the

Last updated: 2/12/2023

An article published in the June 10 2002 issue of the Archives of Internal Medicine reported on a study of the effectiveness of a nicotine lozenge for helping smokers quit smoking Shiffman et al 2002 Newspaper ads sought volunteers who were smokers interested in quitting The volunteers who participated were randomly assigned to receive either the nicotine lozenge or a placebo lozenge with no active ingredient After 6 weeks and after 52 weeks they were asked whether or not they had quit smoking Which type of sampling was used in this study O Non probability sampling O Probability sampling