title: Hypothesis tests and p-values.
abstract: The goal of this column is to help working clinicians understand p-values and the machinery of hypothesis testing underlying them, using a fictional study of an anti-insomnia drug. The author discusses what p-values really mean and common misconceptions concerning them.
authors.affiliation: Department of Laboratory Medicine at the University of Washington Medical Center, Seattle, WA.
authors.forename: Frederick J
authors.initials: FJ
authors.lastname: Ross
mesh_terms: D000704:Analysis of Variance; D016001:Confidence Intervals; D006801:Humans; D006993:Hypnotics and Sedatives / Q000627:therapeutic use*; D012107:Research Design / Q000706:statistics & numerical data*; D007319:Sleep Initiation and Maintenance Disorders / Q000188:drug therapy*; D013223:Statistics as Topic
chemical_list: D006993:Hypnotics and Sedatives